UNIVERSITY OF SOUTH AFRICA (UNISA)
College of Human Sciences
⋄
IOP2606 ASSIGNMENT 01
Semester 1, 2026
⋄
Module Code: IOP2606
Module Name: Personality and Individual Differences
Student Name: [Insert Your Name]
Student Number: [Insert Student Number]
Assignment No.: 01
Due Date: [Insert Due Date]
Semester: Semester 1, 2026
Unique Number: [Insert Unique Number]
Submitted in partial fulfilment of the requirements for IOP2606: Personality and Individual
Differences
at the University of South Africa.
,UNISA | IOP2606 Personality and Individual Differences
Question 1: Understanding Individual Differences
Personality psychology is built on a foundational observation: people are not the same. They
think differently, feel differently, and act differently, and these differences are not random.
They are stable, patterned, and meaningful. Personality is defined as an individual’s consis-
tent patterns of feeling, thinking, and behaving, shaped by a combination of innate disposi-
tions and environmental experiences (John, Robins and Pervin, 2008, as cited in Psychology
Today, 2009). For industrial and organisational psychology, understanding these differences
is not merely theoretical. It informs how people are selected, trained, managed, and sup-
ported at work. This question examines three levels of individual differences: differences in
thinking, feeling, and behaving; the conceptual frameworks that structure those differences;
and how situations moderate their expression.
1a) Differences Among Individuals in Terms of Thinking, Feeling, and Behaving
Individual differences manifest across three interrelated but distinguishable psychological do-
mains: cognition (thinking), affect (feeling), and behaviour (behaving). These three domains
together define what makes one person observably different from another.
Differences in Thinking
Cognitive differences refer to variation in how individuals perceive, process, organise, and
apply information. Some people gravitate toward abstract reasoning and theoretical thinking;
others rely on concrete, sensory, and empirical approaches. These differences in cognitive
style shape how individuals solve problems, make decisions, and learn new material. The
Cognitive-Affective Processing System (CAPS) model, developed by Mischel and Shoda
(1998), characterises personality as a characteristic pattern of cognitions and affects that
becomes activated through a distinctive network of connections (Frontiers in Psychology,
2021). What this means in practice is that people with different personality configurations
literally process the same situation through different cognitive filters, attending to different
cues, assigning different meanings, and arriving at different conclusions.
Research on cognitive trait models confirms that differences in openness to experience and
conscientiousness, two of the Big Five personality dimensions, are systematically related to
reasoning style and information processing preferences (Psychology Today, 2009). Individ-
Page 1 of 25
, UNISA | IOP2606 Personality and Individual Differences
uals high in openness tend to engage with complexity, seek novelty, and tolerate ambiguity;
those high in conscientiousness tend toward organised, methodical, goal-directed thinking.
These differences are not mere stylistic preferences. They predict academic performance,
occupational success, and the kinds of work roles in which individuals are likely to thrive
(Smedley et al., 2025).
Differences in Feeling
Affective differences concern the intensity, frequency, and nature of emotional experiences.
Some individuals experience emotions vividly and are highly reactive to both positive and neg-
ative stimuli; others maintain emotional equilibrium across a wide range of circumstances.
In the Big Five framework, neuroticism captures individual differences in emotional instabil-
ity, anxiety, moodiness, and sensitivity to stress, while extraversion captures the tendency to
experience positive affect, enthusiasm, and social energy (McLeod, 2025).
The Behavioural Inhibition System and Behavioural Approach System (BIS/BAS) model pro-
posed by Gray (1987, as cited in Frontiers in Psychology, 2021) adds explanatory depth here.
People with a dominant BIS are more sensitive to signals of threat, punishment, and nega-
tive outcomes; they tend to experience more anxiety and inhibit their behaviour in the face of
uncertainty. People with a dominant BAS are more attuned to signals of reward and desired
outcomes; they experience more enthusiasm, impulsivity, and positive affect. These biologi-
cally grounded differences in affective sensitivity create consistent emotional tendencies that
shape how people experience the workplace, relationships, and daily life.
The University of Sunderland (2023) notes that when patterns of feeling become extreme or
inflexible, they can result in personality disorders such as borderline personality disorder or
narcissistic personality disorder, which are distinguished by their severity and lack of adapt-
ability rather than by the mere existence of emotional differences.
Differences in Behaving
Behavioural differences are the most directly observable form of individual differences. They
encompass how people act in social situations, how they approach tasks, how they respond
to authority, and how they treat others. Allport and Odbert (1936, as cited in Nasello, Triffaux
and Hansenne, 2024) identified over 17,000 trait-related terms in the English language, reflect-
ing the enormous vocabulary humans have developed for describing behavioural variation.
Page 2 of 25
College of Human Sciences
⋄
IOP2606 ASSIGNMENT 01
Semester 1, 2026
⋄
Module Code: IOP2606
Module Name: Personality and Individual Differences
Student Name: [Insert Your Name]
Student Number: [Insert Student Number]
Assignment No.: 01
Due Date: [Insert Due Date]
Semester: Semester 1, 2026
Unique Number: [Insert Unique Number]
Submitted in partial fulfilment of the requirements for IOP2606: Personality and Individual
Differences
at the University of South Africa.
,UNISA | IOP2606 Personality and Individual Differences
Question 1: Understanding Individual Differences
Personality psychology is built on a foundational observation: people are not the same. They
think differently, feel differently, and act differently, and these differences are not random.
They are stable, patterned, and meaningful. Personality is defined as an individual’s consis-
tent patterns of feeling, thinking, and behaving, shaped by a combination of innate disposi-
tions and environmental experiences (John, Robins and Pervin, 2008, as cited in Psychology
Today, 2009). For industrial and organisational psychology, understanding these differences
is not merely theoretical. It informs how people are selected, trained, managed, and sup-
ported at work. This question examines three levels of individual differences: differences in
thinking, feeling, and behaving; the conceptual frameworks that structure those differences;
and how situations moderate their expression.
1a) Differences Among Individuals in Terms of Thinking, Feeling, and Behaving
Individual differences manifest across three interrelated but distinguishable psychological do-
mains: cognition (thinking), affect (feeling), and behaviour (behaving). These three domains
together define what makes one person observably different from another.
Differences in Thinking
Cognitive differences refer to variation in how individuals perceive, process, organise, and
apply information. Some people gravitate toward abstract reasoning and theoretical thinking;
others rely on concrete, sensory, and empirical approaches. These differences in cognitive
style shape how individuals solve problems, make decisions, and learn new material. The
Cognitive-Affective Processing System (CAPS) model, developed by Mischel and Shoda
(1998), characterises personality as a characteristic pattern of cognitions and affects that
becomes activated through a distinctive network of connections (Frontiers in Psychology,
2021). What this means in practice is that people with different personality configurations
literally process the same situation through different cognitive filters, attending to different
cues, assigning different meanings, and arriving at different conclusions.
Research on cognitive trait models confirms that differences in openness to experience and
conscientiousness, two of the Big Five personality dimensions, are systematically related to
reasoning style and information processing preferences (Psychology Today, 2009). Individ-
Page 1 of 25
, UNISA | IOP2606 Personality and Individual Differences
uals high in openness tend to engage with complexity, seek novelty, and tolerate ambiguity;
those high in conscientiousness tend toward organised, methodical, goal-directed thinking.
These differences are not mere stylistic preferences. They predict academic performance,
occupational success, and the kinds of work roles in which individuals are likely to thrive
(Smedley et al., 2025).
Differences in Feeling
Affective differences concern the intensity, frequency, and nature of emotional experiences.
Some individuals experience emotions vividly and are highly reactive to both positive and neg-
ative stimuli; others maintain emotional equilibrium across a wide range of circumstances.
In the Big Five framework, neuroticism captures individual differences in emotional instabil-
ity, anxiety, moodiness, and sensitivity to stress, while extraversion captures the tendency to
experience positive affect, enthusiasm, and social energy (McLeod, 2025).
The Behavioural Inhibition System and Behavioural Approach System (BIS/BAS) model pro-
posed by Gray (1987, as cited in Frontiers in Psychology, 2021) adds explanatory depth here.
People with a dominant BIS are more sensitive to signals of threat, punishment, and nega-
tive outcomes; they tend to experience more anxiety and inhibit their behaviour in the face of
uncertainty. People with a dominant BAS are more attuned to signals of reward and desired
outcomes; they experience more enthusiasm, impulsivity, and positive affect. These biologi-
cally grounded differences in affective sensitivity create consistent emotional tendencies that
shape how people experience the workplace, relationships, and daily life.
The University of Sunderland (2023) notes that when patterns of feeling become extreme or
inflexible, they can result in personality disorders such as borderline personality disorder or
narcissistic personality disorder, which are distinguished by their severity and lack of adapt-
ability rather than by the mere existence of emotional differences.
Differences in Behaving
Behavioural differences are the most directly observable form of individual differences. They
encompass how people act in social situations, how they approach tasks, how they respond
to authority, and how they treat others. Allport and Odbert (1936, as cited in Nasello, Triffaux
and Hansenne, 2024) identified over 17,000 trait-related terms in the English language, reflect-
ing the enormous vocabulary humans have developed for describing behavioural variation.
Page 2 of 25
