112 Psychosocial Development in Emerging and Early Adulthood

Martha Lally; Suzanne Valentine-French; and Dinesh Ramoo

Learning Objectives

  • Describe the relationship between infant and adult temperament
  • Explain personality in early adulthood
  • Explain the five-factor model of personality
  • Describe adult attachment styles
  • Explain adult gender identity
  • Describe gender roles

Temperament and Personality in Adulthood

If you remember from chapter three, temperament is defined as the innate characteristics of the infant, including mood, activity level, and emotional reactivity, noticeable soon after birth. Does one’s temperament remain stable through the lifespan? Do shy and inhibited babies grow up to be shy adults, while the sociable child continues to be the life of the party? Like most developmental research the answer is more complicated than a simple yes or no. Chess and Thomas (1987), who identified children as easy, difficult, slow to warm up, or blended, found that children identified as easy grew up to became well-adjusted adults, while those who exhibited a difficult temperament were not as well-adjusted as adults. Jerome Kagan (2002) has studied the temperamental category of inhibition to the unfamiliar in children. Infants exposed to unfamiliarity reacted strongly to stimuli and cried loudly, pumped their limbs, and had an increased heart rate. Research has indicated that these highly reactive children show temperamental stability into early childhood, and Bohlin and Hagekull (2009) found that shyness in infancy was linked to social anxiety in adulthood.

An important aspect of this research on inhibition was looking at the response of the amygdala, which is important for fear and anxiety, especially when confronted with possible threatening events in the environment. Using functional magnetic resonance imaging (FMRIs) young adults identified as strongly inhibited toddlers showed heightened activation of the amygdala when compared to those identified as uninhibited toddlers (Davidson and Begley, 2012).

The research does seem to indicate that temperamental stability holds for many individuals through the lifespan, yet we know that one’s environment can also have a significant impact. Recall our discussion on epigenesis or how environmental factors are thought to change gene expression by switching genes on and off. Many cultural and environmental factors can affect one’s temperament, including supportive versus abusive child rearing, socioeconomic status, stable homes, illnesses, teratogens, and so forth. Additionally, individuals often choose environments that support their temperament, which in turn further strengthens them (Cain, 2012). In summary, because temperament is genetically driven, genes appear to be the major reason why temperament remains stable into adulthood. In contrast, the environment appears mainly responsible for any change in temperament (Clark and Watson, 1999).

Everybody has their own unique personality; that is, their characteristic manner of thinking, feeling, behaving, and relating to others (John, Robins, and Pervin, 2008). Personality traits refer to these characteristic, routine ways of thinking, feeling, and relating to others. Personality integrates one’s temperament with cultural and environmental influences. Consequently, there are signs or indicators of these traits in childhood, but they become particularly evident when the person is an adult. Personality traits are integral to each person’s sense of self, as they involve what people value, how they think and feel about things, what they like to do, and, basically, what they are like most every day throughout much of their lives.

Five-Factor Model

There are hundreds of different personality traits, and all of these traits can be organized into the broad dimensions referred to as the five-factor model (John, Naumann, and Soto, 2008). These five broad domains include: openness, conscientiousness, extraversion, agreeableness, and neuroticism (use the acronym “OCEAN” to remember them). This applies to traits that you may use to describe yourself. Table 7.3 provides illustrative traits for low and high scores on the five domains of this model of personality.

Table 7.3: The Big Five Personality Traits
Adapted from John, Naumann, and Soto (2008)
Dimension Description Examples of behaviours predicted by the trait
Openness to experience A general appreciation for art, emotion, adventure, unusual ideas, imagination, curiosity, and variety of experience Individuals who are highly open to experience tend to have distinctive and unconventional decorations in their home. They are also likely to have books on a wide variety of topics, a diverse music collection, and works of art on display.
Conscientiousness A tendency to show self-discipline, act dutifully, and aim for achievement Individuals who are conscientious have a preference for planned rather than spontaneous behaviour.
Extraversion The tendency to experience positive emotions and to seek out stimulation and the company of others Extroverts enjoy being with people. In groups, they like to talk, assert themselves, and draw attention to themselves.
Agreebleness A tendency to be compassionate and cooperative rather than suspicious and antagonistic toward others in general concern for social harmony Agreeable individuals value getting along with others. They are generally considerate, friendly, generous, helpful, and willing to compromise their interest with those of others.
Neuroticism The tendency to experience negative emotions, such as anger, anxiety, or depression, sometimes called “emotional instability” Those who score high in neuroticism are more likely to interpret ordinary situations as threatening and minor frustrations and hopelessly difficult. They may have trouble thinking clearly, making decisions, and coping effectively with stress.

Does personality change throughout adulthood? Previously the answer was no, but contemporary research shows that although some people’s personalities are relatively stable over time, others’ are not (Lucas and Donnellan, 2011; Roberts and Mroczek, 2008). Longitudinal studies reveal average changes during adulthood in the expression of some traits (for example, neuroticism and openness decrease with age and conscientiousness increases) and individual differences in these patterns due to idiosyncratic life events (such as divorce or illness). Longitudinal research also suggests that adult personality traits, such as conscientiousness, predict important life outcomes including job success, health, and longevity (Friedman et al., 1993; Roberts, Kuncel, Shiner, Caspi, and Goldberg, 2007).

The Harvard Health Letter (2012) identifies research correlations between conscientiousness and lower blood pressure, lower rates of diabetes and stroke, fewer joint problems, being less likely to engage in harmful behaviours, being more likely to stick to healthy behaviours, and more likely to avoid stressful situations. Conscientiousness also appears related to career choices, friendships, and stability of marriage. Lastly, a person possessing both self-control and organizational skills, both related to conscientiousness, may withstand the effects of aging better and have stronger cognitive skills than one who does not possess these qualities.

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Psychosocial Development in Emerging and Early Adulthood Copyright © 2022 by Martha Lally; Suzanne Valentine-French; and Dinesh Ramoo is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.

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