Articles

This article presents the results of a study of mathematical fluency in high school students. We provide a definition of mathematical fluency and illustrate the relevance of the research by presenting an overview of studies examining mathematical fluency development and its relationship with success in mathematical disciplines.

A computerized test “Problem Verification Task” (Tosto et al., 2013) was administered to 692 high school students from one public secondary school (grades 9/10/11: n = 336/210/146) in the Moscow region. The stimuli consisted of 48 elementary arithmetic equations along with answer options. To indicate a correct answer, participants were instructed to press the corresponding key on the keyboard as quickly as possible.

Two-way ANOVA was used to estimate grade and sex similarities and differences in mathematical fluency at the high school level.

The current study has two primary findings: (1) students differed in math fluency across grades, and (2) there were no sex differences in mathematical fluency at the high school level. ANOVA exhibited significant differences in mathematical fluency among all three groups of students at grades 9, 10 and 11 with a 19% effect size. These results may be associated with the accumulating effects of the educational process: high school students in each subsequent year of schooling demonstrate a higher level of mathematical fluency on average compared to the previous year. At the same time, we observed no sex differences in mathematical fluency at the high school level. The results are discussed in terms of educational effects.

This article describes the functions of metacognition and the role of these functions in professional pedagogical thinking (PPT): the discovery of the emergence of a problemacy, the organization of cognition processes, and the management of the comprehension and resolution of the problem situation. Thinking is related to the metacognitive activity of a subject. Components and strategies of metacognition are included in the PPT process and define (by means of conscious or unconscious regulation) the efficiency of discovering and solving problems in an interpersonal interaction situation that must be comprehended and transformed. One of the conditions providing for realization of the supra-situational thinking of professionals is a high level of metacognitive activity, although the level of the pronouncedness of metacognitive activity does not depend on the subject’s possessing basic professional education.

We have created and tested new psychodiagnostic techniques aimed at defining the level of forecasting in problem (conflict) situations and at evaluating metacognitive knowledge and activity. The sample group included about 800 people (university lecturers, school teachers, and teachers who train college students). It was proved that the metacognitive focus of forecasting stimulates the formation and development of various forecasting types: proactive, retroactive, and interactive. Forecasting is viewed as a metacognitive component of supra-situational thinking and a component of the cognitive side of communication. Situational and supra- situational types of pedagogical thinking are shown to have different properties and different orientations toward forecasting activity; these properties and orientations determine the differentiation and hierarchization of these types of thinking. It was discovered that the metacognitive properties of supra-situational thinking are achieved through a high degree of integration of all basic forecasting qualities (analyticity, depth, awareness, flexibility, prospectiveness, and validity).

The efficiency of our devised and tested program aimed at perfecting PPT is evident in the dynamics of its objective and subjective properties (an increased level of suprasituativity of thinking among the program participants and the participants’ subjective evaluations of transformation in coping with difficulties in conflict situations). The formation of supra-situational thinking—in particular, of components such as forecasting (in both a narrow and a broad context)—is closely connected with envisaging prospects, including those for one’s own professional and personality development.

This issue of “Psychology in Russia: State of the Art” is focused on the topic of psychology and education. It also introduces a new section on psychology and bioethics, and we hope to start a meaningful discussion in this proliferating field of research.

This research is based on the ideas of Humanistic-Existential Psychology, a positive approach to personal growth, and modern educational concepts concerning the dynamics of professional and social identity in the stratum of secondary and primary school teachers. The goal of the study is to get an objective picture of the professional and personal changes among Russian teachers under the conditions of school modernization. We offer a detailed model of the semi-structured interview with modern teachers, in combination with observation. The interview consists of 63 questions divided into 9 topics, and deals with issues related to what their professional activities mean to the teachers; the teachers’ evaluation of professional dynamics; their attitude toward various aspects of professional life; and their general world outlook and values. We also briefly describe a pre-interview “warm-up” strategy. This stage of the research resulted in the successful pilot use of the research methodology, and data sufficient to evaluate the initial trends of the analysis of all the data. The study’s main conclusions concern the observation technique, which offers a significant increase in the potential of the interview method, mainly through providing the ability to interpret non-verbal reactions, the level of openness, and the teacher’s trust in the dialogue. Moreover, we must note that, when we asked teachers to answer complicated written questions, their answers, judgments, and arguments varied greatly, regardless of their professional and personal characteristics (employment history, qualification category, the subject they teach, type of school, etc.)

Patterns of the relationship between the development of learning ability as one of the general abilities and metacognitive traits of personality are considered in the article. The necessity of appeal to this issue arises from the peculiarities of the current state of research in the theory of abilities and modern metacognitivism. Despite the ever-increasing number of studies in the field of general abilities and learning ability in particular and in the field of metacognitive processes of the personality, the possible interconnection of this class of processes and the level of learning ability and, therefore, the interpretation of this interconnection are rarely considered. To date these crucial areas are not in sufficient contact with each other. The purpose of this study is to identify and interpret the possible relationship of the level of learning ability with metacognitive processes and qualities of the individual and their organization. The research procedure was based on a comparison of the individual measures of the development of learning ability as a general ability with the diagnostics of the main parameters of the metacognitive sphere of personality, including features of its organization and implementation in relation to the methodology of structural-psychological analysis. This procedure is based on the determination of matrices of intercorrelation and the subsequent interpretation of correlograms of the metacognitive parameters of a person. The main result is that there exists a mutual dependence of characteristics of the level of learning ability and basic parameters of the metacognitive sphere of personality (metacognitive processes and traits). This dependence lies in the fact that an increase in the level of development of learning ability increases the intensity of separate metacognitive personal qualities and the general level of their structural organization. An interpretation of the data is presented. According to it, learning ability, as a significant factor in the level of development of metacognitive processes and personality traits, acquires an additional and quite powerful resource to enhance at the same time its own level because of the organization of these processes and traits.

This work is dedicated to the development of L.S. Vygotsky’s ideas in clinical psychology and the clarification of some basic points of the cultural-historical concept. The paper presents a thesis about the development of man in ontogeny as the result of his interaction with the cultural environment, which transforms natural mental functions into higher mental functions. This process can be attended by a whole range of psychopathologies. The issues discussed include voluntary regulation of higher mental functions, determination of the involuntariness and “post-voluntariness” of functions, the internalization of actions, the differentiation of affect and emotion (including as higher mental functions), the “cultural” socialization of non-mental functions (sex, sleep, excretion), and the discord between natural and “cultural” entities in a person. The basis for the ontological development of man is the genesis of “subjectness”, like all the forms of higher activity that emerge when encountering cultural restrictions and requirements causing specific mental disorders. The supposition is made that there are no significant restrictions to explaining either mental or non-mental functions with the cultural-historical approach. Recommendations for further research are suggested.

From a Relational-Historical theoretical framework applied to clinical psychological practice, this study examines the data set underlying the personality attributes of different groups of children with behavior problems as demonstrated on the Rorschach Inkblot Test. To define the groups, categories were established from parents’ descriptions of their own children. This procedure allowed for the formation of three major psychological profiles: hyperkinetic, oppositional defiant, and antisocial (Saraiva & Ferreira, 2016). The major goal of this study is data exploration in a clinical setting, in order to investigate whether and in what ways groups of hyperkinetic, oppositional defiant, and antisocial children differ. These profile characteristics are important issues embraced by both psychodiagnosis and psychotherapy. The participants for this study were 39 Portuguese children, who were private clinic clients; there were 24 boys and 15 girls between the ages of 6 and 14. Their personality attributes were measured using the Rorschach Inkblot Test (Rorschach, 1994), and the Comprehensive System developed by Exner (1991, 1993, 2000) was applied, with the support of the clinical interpretation provided by Quintino-Aires (1999; 2009; 2012; 2014). Comparison of the three profiles showed four common aspects of personality structure: a deficit in cognitive perceptual skills, lack of self-control, limited relational skills, and low self-esteem. Differences in the three profiles revealed factors related to the functional characteristics of specific behavior patterns. Children with the hyperkinetic psychological profile show factors of difficulty in controlling their activity, impulsivity, and overlapping emotions about conscious action. Those with the oppositional defiant profile revealed factors of low self-confidence, low trust in others, high pessimism, loneliness, and structural stress. Finally, those with the antisocial profile had factors of a deficit in coping skills, lack of verbalization of affects and emotions, and egotism.

Guided by the principle that scientific knowledge should serve to transform reality and create suitable conditions of life for all, the Portuguese Association for Relational-Historical Psychology (APPRH) founded a school named RITA LEAL (RLS), with a therapeutic purpose based on new perspectives for treating autism — perspectives quite different from instrumental and behavioral learning programs. The Rita Leal School (Leal, 1975/2004, 1997, 2005, 2010) is rooted in the theory that mental development is based on a mutually contingent emotional relationship, while it underwrites Vygotsky’s concept of the Zone of Proximal Development (ZPD) and Mediation (1930/2004, 1934/2009). Learning to read is a complex process which individuals with Autism Spectrum Disorder (ASD) master slowly and with difficulty. We analyzed the process of learning to read of two ASD children accompanied by peers without special educational needs, aiming to pinpoint distinct aspects of their progress. We used the Observer Software Program to collect and analyze observations of their performance, which were understood as data to be classified according to previously specified codes. We believed we could demonstrate that, especially in the case of ASD children, learning is dependent on contingent responses and adequate levels of mediation. The technical team at the RLS has continuous clinical supervision. That is because we believe this supervision is what permits the team to undergo a process of de-centering, becoming more empathic and accessible to the autists. This makes the team’s intervention more efficient, because it becomes more aware of each autist’s individual characteristics, and therefore more available to respond to the autist’s needs.

Low birth weight has a negative impact on psychomotor development, specifically on motor and perceptual functions. In order to prevent this effect, neurodevelopmental diagnosis should be supplemented by an effective therapeutic system. The aim of this work was to test a program for psychomotor development based on A.R. Luria’s concept of three functional brain units or blocks and the necessity of stimulation of the first functional unit in early childhood. Stimulation of subcortical systems associated with psychomotor and cognitive regulation may help to set the basis for positive functioning of the cerebral cortex in the coming years. Vestibular exercises and proprioceptive stimulation were used. All exercises included significant communicative activity as described by Vygotsky and Lisina, which provided positive direct emotional contact between adult and child. Twenty-five babies with low birth weight were included in the study, along with their parents. After 250 days in the program, all the underweight children presented positive functional development. We conclude that positive effects of these programs for correction and psychological development may be achieved during the first year of life. The methods for sensitive diagnosis and correction should be considered by all specialists involved in topics of early development.

This article deals with vital questions of the health and safety of children with intellectual disability (mental disability and mixed specific disorders). Theoretical analysis has demonstrated insufficient study of the problem, both in national and foreign psychological and pedagogical studies, although a number of approaches exist. Researchers agree that development of these children is an important condition for the existence of both individual and society at large. At the contemporary stage of development of our society, the safety of the children is all the more relevant since the degree of their development is an important condition of socialization and normal interaction with the environment. Diagnostic tools to estimate the comprehension and recognition of unsafe situations by children with these disorders are still insufficiently developed.

This paper describes the application of a technique called “Recognition of Unsafe Situations”, which was designed to study the ability of children with intellectual disability to recognize potentially life-threatening situations (handling household appliances, electricity, medicine, hot or sharp objects, behavior at heights and with stray animals) and to predict the consequences of their actions in such situations. The results of this study allow us to determine the differences in recognizing unsafe situations by children with mental disability and children with mixed specific developmental disorders. We show that children with mixed specific developmental disorders have a certain ability to identify potentially unsafe situations, and with support provided by adults, they are able to predict the consequences of their actions. Children with mental disability, however, have insufficient knowledge of safe behavior; but special activities that take into account these children’s ability to compensate enable them to develop the essential skills for behavior in potentially life-threatening situations.

The zone of proximal development is a well-known and frequently referenced term within cultural historical psychology. Nevertheless, it is rarely used in the concrete practice of assessing intellectual development. The majority of proposals for such assessment are based on a behavioral and psychometric conception of development. This study presents a Scheme for Evaluation of Intellectual Development based on the concept of the zone of proximal development and on gradual intellectual development. The Scheme was applied to 160 Mexican pre-school children from rural, suburban, official, and private kindergartens. The Scheme permitted us to determine the zone of proximal development by evaluating the children’s level of external orientation during the solution of new intellectual tasks. Three levels of orientation through external help were established. The results showed that the majority of children from all groups managed to fulfil new tasks after receiving external help, which indicated the existence of their zone of proximal development. Differences were detected in the use of the level of help in all groups. Statistical analysis showed a significant correlation between the level of helping received, the degree of fulfilment of the task, and the children’s socio-cultural group. The results permitted us to establish more precisely the zone of proximal development at pre-school age. We discuss how the concept of the zone of proximal development might be used in concrete psychological practice and research, instead of being only a well-known term at a declarative level.

Preschool childhood is a time of rapid development. During this period a child`s interaction with significant adults plays a very important role. The parent, as a mediator, defines the “zone of proximal development” (Vygotsky, 1984). The common assumption is that to determine a parent’s position, it is important to acknowledge both socio-demographic factors and the parameters which define the socio-psychological aspects of parent-child relationship. Hence, the type of research where a child’s psychological development is studied in the context of the socio-demographic and socio-psychological factors which determine the social situation of development, is very promising.

Based on our previous research (Sobkin, Marich, 2002; Cheie, Veraksa, 2015), a program of experimental research intended to determine the interconnections between the socio-demographic and socio-psychological parameters of parent-child relationships, and the level of a child’s psychic development, was designed. The research was based upon the material obtained through testing 59 children between 5 and 7 years old with specially collected psychological testing methods (Veraksa A.N. etc), as well as from the results of a special sociological questionnaire presented to their mothers (Sobkin V.S. etc). The research was carried out in 2014-2015 in municipal kindergartens of Moscow.

Among the socio-demographic factors analyzed, the most significant results were related to the child’s gender, the family structure, and the mother’s education. Thus, boys showed higher results on visual memory tests, and girls scored better on tests for self-control and social intelligence (higher ability to detect the reason for someone else’s negative emotions). Children from single-parent families had better results on verbal memory tests, but scored lower on those for self-control. Also they had less ability for decentration. The differences in mothers’ educational levels influenced the number and intensity of children’s fears, as well as their inclinations to avoid fearsome situations.

The analysis of features of the parenting position (such as attitude toward one’s future, positive/negative emotional state during the interaction with the child, authoritative/ democratic approach to upbringing) revealed two different strategies which children used to perform executive tasks.

Thus, the present research showed a significant degree of essential connections between socio-demographic factors and parent-child relationships to the specifics of a child’s mental development.

The study presented in this article relies on the principles of the cultural-historical theory, which defines cultural impact as the main driving force behind psychological development. Based on the assumption that culture is a set of normative situations, the study identifies rules that are typical for primary school students in big Russian cities. These rules are grouped into what we refer to as factors of cultural compliance, which ultimately can be seen as indicators of pupils’ cultural congruence. In specifying the cultural congruence of primary school students, we take into account not only the rules of school life but also the whole range of stable rules for children 7- to 10-years-old. Researchers at the Psychology Institute of the Higher University of the Chinese Academy of Science (Wang, Zhu, & Shi, 2011) call such rules usual or contextually usual. We include rules that govern the behavior of children who have cultural differences, so in this article we are talking about the rules that are typical for children of this age in Russia.

The goal of the study was to develop a test to diagnose the level of cultural congruence. The test was exposed to psychometric evaluation for validity, reliability, and discriminatory power. Factor analysis by means of varimax rotation provided for calibration of the rules by consolidating them into factors. These factors underpin the test and include the categories social interaction, academic competence, regulation, obedience, self-service, and self-control. In accordance with the principles employed in psychology, the factors confirm the construct validity of the test in relation to children’s development when they are between 7 and 10 years old. The study confirms that learning is the main activity at this age by introducing a factor that brings together rules inherent in normative situations in the education process. The social setting for psychological development, viewed as a specific relationship between a child at the given age and the environment, is determined by the child’s interaction with an adult. The factor of obedience is the key parameter for children of the age under consideration. New at this age are arbitrariness, self-regulation, self-analysis, and an internal action plan. Self-control is also conceptually linked to these factors.

The study offers a new look at the cultural determination of psychological development in ontogenesis. Validated in the course of the investigations, the test can be used to diagnose cultural congruence — that is, the compliance of a primary school student with rules inherent in normative situations.

Traditionally, neuropsychology has focused on identifying the brain mechanisms of specific psychological processes, such as attention, motor skills, perception, memory, language, and consciousness, as well as their corresponding disorders. However, there are psychological processes that have received little attention in this field, such as dreaming. This study examined the clinical and experimental neuropsychological research relevant to dreaming, ranging from sleep disorders in patients with brain damage, to brain functioning during REM sleep, using different methods of brain imaging. These findings were analyzed within the framework of Luria’s Three Functional Unit Model of the Brain, and a proposal was made to explain certain of the essential characteristics of dreaming. This explanation describes how, during dreaming, an activation of the First Functional Unit occurs, comprising the reticular formation of the brainstem; this activates, in turn, the Second Functional Unit — which is formed by the parietal, occipital, and temporal lobes and Unit L, which is comprised of the limbic system, as well as simultaneous hypo-functioning of the Third Functional Unit (frontal lobe). This activity produces a perception of hallucinatory images of various sensory modes, as well as a lack of inhibition, a non-selfreflexive thought process, and a lack of planning and direction of such oneiric images. Dreaming is considered a type of natural confabulation, similar to the one that occurs in patients with frontal lobe damage or schizophrenia. The study also suggests that the confabulatory, bizarre, and impulsive nature of dreaming has a function in the cognitiveemotional homeostasis that aids proper brain function throughout the day.

The aims of this paper are: 1) to show the role of clinical experience for the theoretical contributions of L.S. Vygotsky, and 2) to analyze the development of these theories in contemporary applied neuropsychology. An analysis of disturbances of mental functioning is impossible without a systemic approach to the evidence observed. Therefore, medical psychology is fundamental for forming a systemic approach to psychology. The assessment of neurological patients at the neurological hospital of Moscow University permitted L.S. Vygotsky to create, in collaboration with A.R. Luria, the theory of systemic dynamic localization of higher mental functions and their relationship to cultural conditions. In his studies of patients with Parkinson’s disease, Vygotsky also set out 3 steps of systemic development: interpsychological, then extrapsychological, then intrapsychological. L.S. Vygotsky and A.R. Luria in the late 1920s created a program to compensate for the motor subcortical disturbances in Parkinson’s disease (PD) through a cortical (visual) mediation of movements. We propose to distinguish the objective mediating factors — like teaching techniques and modalities — from subjective mediating factors, like the individual’s internal representation of his/her own disease. The cultural-historical approach in contemporary neuropsychology forces neuropsychologists to re-analyze and re-interpret the classic neuropsychological syndromes; to develop new assessment procedures more in accordance with the patient’s conditions of life; and to reconsider the concept of the social brain as a social and cultural determinant and regulator of brain functioning. L.S. Vygotsky and A.R. Luria proved that a defect interferes with a child’s appropriation of his/her culture, but cultural means can help the child overcome the defect. In this way, the cultural-historical approach became, and still is, a methodological basis for remedial education.

The steadily increasing demand for artistic professions brings to the fore the task of studying the phenomenon of art by researching the unique capacity of the human brain to create works of art in different spheres of creative activity. So far, only a few studies have investigated creativity-related brain activity in representatives of the creative professions. The aim of the empirical research was to study the neurophysiological correlates of artistic image creation by representatives of the artistic professions. The participants were 60 right-handed females aged 23-27, divided into three groups— artists (23 people), actors (17 people), and specialists who do not work in an artistic field (20 people). The mono-typing technique was used to model the creative artistic process. EEG signals were recorded in a resting state, and during four stages of the creation of an artistic image (viewing of monotypes, frustration, image creation, and thinking over the details) from 21 electrodes set on the scalp according to the International 10-20 System. We analyzed EEG coherence for each functional trial at theta (4.00–8.00 Hz), alpha1 (8.00–10.5 Hz), alpha2 (10.5–13.00 Hz), and beta (13.00– 35.00 Hz) frequency bands. For statistical analysis, we used MANOVA and post hoc analysis. We found that the neurophysiological correlates of creating an artistic image are different at different stages of the creative process, and have different features for artists and actors. The actors primarily show dominance of right hemisphere activity, while close interaction of the hemispheres distinguishes the brains of the artists. The differences revealed in brain cortex functioning when artists or actors create an artistic image reflect different strategies of imaginative creative work by representatives of these professions.

Investigators are finding increasing evidence for cross-cultural specificity in face cognition along with individual characteristics. The functions on which face cognition is based not only are types of general cognitive functions (perception, memory) but are elements of specific mental processes. Face perception, memorization, correct recognition of faces, and understanding the information that faces provide are essential skills for humans as a social species and can be considered as facets of social (cultural) intelligence. Face cognition is a difficult, multifaceted set of processes. The systems and processes involved in perceiving and recognizing faces are captured by several models focusing on the pertinent functions or including the presumably underlying neuroanatomical substrates. Thus, the study of face-cognition mechanisms is a cross-disciplinary topic. In Russia, Germany, and China there are plans to organize an interdisciplinary crosscultural study of face cognition. The first step of this scientific interaction is conducting psychological and psychophysiological studies of face cognition in multinational Russia within the frame of a grant supported by the Russian Science Foundation and devoted to “cross-cultural tolerance”. For that reason and in the presence of the huge diversity of data concerning face cognition, we suggest for discussion, specifically within the psychological scientific community, three aspects of face cognition: (1) psychophysiological (quantitative data), (2) developmental (qualitative data from developmental psychology), and (3) cross-cultural (qualitative data from cross-cultural studies). These three aspects reflect the different levels of investigations and constitute a comprehensive, multilateral approach to the problem. Unfortunately, as a rule, neuropsychological and psychological investigations are carried out independently of each other. However, for the purposes of our overview here, we assume that the main factors that could influence the developmental, individual psychophysiological, and cross-cultural differences in face cognition are not only biological but also social and cultural. One of the principal tasks of this article is to draw the attention of psychologists to the physiology of face processing and to draw the attention of neuroscientists to the psychology of face cognition. Thus, the main goal of the article is to instigate a discussion among social psychologists, psychophysiologists, and neuroscientists about the mechanisms of face cognition, which, as in a mirror, reflect the basic, fundamental “psychophysical” problem of psychophysiology.

L. S. Vygotsky in his famous methodological essay “The historical meaning of psychological crisis” (1928) emphasized the importance of studying any psychological process or state as a “whole” — that is, as characterized from the subjective and objective sides at the same time. This position is fully relevant for studying the human functional states (FSes). Today the objective psychophysiological diagnostics of human FSes in activities associated with a high risk of technological disasters (in nuclear-power plants, transportation, the chemical industry) are extremely relevant and socially important. This article reviews some new psychophysiological methods of FS assessment that are being developed in Russia and abroad and discusses different aspects of developing integral psychophysiological FS assessment. The emphasis is on distant methods of FS diagnostics: the bioradiolocation method, laser Doppler vibrometry, eye tracking, audio and video recordings, infrared thermography. The possibilities and limitations of the most popular emotion atlases — the Facial Affect Scoring Technique (FAST) and the Facial Action Coding System (FACS) — in developing distant visual-range and infrared-range systems for automated classification of facial expressions are analyzed. A special section of the article concentrates on the problem of constructing an integral psychophysiological FS index. Mathematical algorithms that provide a partition of FS indicators into different FS types are based on various methods of machine learning. We propose the vector approach for construction of complex estimations of the human FSes.

Psychology is now one of the most popular sciences for young students. But whether academic production or professional practice, it is still in crisis. When we look together at two different approaches we realize the enormous amount of syncretism. They are not only two different approaches to the same science. They are more than that, they are different areas of knowledge, with very different practical implications. Discussion of psychology with the other sciences researching the same "objects" is nonexistent. So when it comes to practice, many of young psychologists leave the profession.

This article is an invitation to colleagues for a "look inside" this interesting science that can make a significant contribution to human sciences and the better life of human beings in the 21st century. This call is supported by a re-reading of the text by Lev S. Vygotsky The historical meaning of the crisis in psychology written in 1927. The article is structured in four subtopics: the problem of general science (in Psychology), the problem of terminology, the problem of difficulty in recognizing the crisis and the problem of emptiness. Being a call, of course, it is not a complete and finished analysis. It is rather a desire that, engaging some colleagues, we can continue the dialogue with Vygotsky on this topic started by him ninety years ago.

Although Lev Vygotsky’s interpretation of human cognition was proposed almost one century ago, new scientific and technological advances have significantly supported many of his ideas and hypotheses. His cultural-historical theory of psychological processes, and his contributions to educational psychology, have continued growing without interruption. In this paper, three of Vygotsky’s hypotheses are examined in light of 21st century scientific developments:

1. The influence of cultural factors on human cognition. A diversity of research studies in different countries has corroborated the crucial impact of culture on cognitive test performance; 
2. The role of language in higher psychological processes. According to Vygotsky’s cultural-historical approach, cognitive processes (“complex psychological processes”) are social in origin, but complex and hierarchical in their structure. Intrinsic to the systemic organization of higher cognitive processes is the engagement of external artifacts (objects, symbols, signs), which have an independent history of development within a culture; and 
3. The hypothesis that thought and general complex cognition is associated with certain “inner speech.” Some contemporary neuroimaging studies (particularly PET and fMRI) analyzing “inner speech” have been carried out. These studies have attempted to find the areas of the brain involved in “inner speech.” These scientific advances significantly support Vygotsky’s interpretation of human cognition. It has been found that inner speech depends on activity in Broca’s area and related brain network activity in the left hemisphere. Hence, inner speech is closely related to grammar, language production, and executive functions.

Vygotsky’s important contribution to the understanding of psychological processes has stimulated, and continues to stimulate, a substantial amount of research in this area.