PSY 250 Week 2 Trait and Biological Approaches Example

Twins, Traits and Teamwork: Trait and Biological Approaches to Personality on a Project Team

[Student Name]

University of Phoenix

PSY/250: Psychology of Personality

Week 2 Assignment

[Instructor Name]

[Date]

The team and its members are composites written for a model paper; research findings come from the sources listed.

Trait approaches describe personality as stable dimensions on which people differ, such as how sociable or organized they tend to be. Biological approaches ask where those differences come from, including genes and brain systems. This paper applies both to a composite project team at a tourism office in Tucson, Arizona.

The Team

Four people are building a spring marketing campaign. Lauren, the coordinator, creates detailed timelines and is openly frustrated when others miss them. Diego, the designer, wants long, loud brainstorming sessions and gets bored with planning. Grace, the writer, agrees to everything in meetings and later complains privately to Lauren. Sam, the data analyst, has the most original ideas but submits drafts late. Meetings often end in tension, and the campaign is two weeks behind schedule.

The Big Five Model

The five-factor model describes personality along five broad dimensions: openness to experience, conscientiousness, extraversion, agreeableness and neuroticism, sometimes remembered as OCEAN. Each is a continuum, not a category. People fall somewhere along each dimension, and most fall near the middle.

McCrae and Costa (1987) tested the model by comparing self-reports with ratings by spouses and peers using different instruments, and found that the five factors appeared consistently across methods and raters. That agreement suggests the dimensions reflect real, observable patterns rather than how people choose to describe themselves.

Profiling the Team

Lauren is high in conscientiousness: organized, dependable and goal-directed. Diego is high in extraversion and openness: energized by people and new ideas. Grace is high in agreeableness: cooperative and conflict-avoidant. Sam is high in openness and low in conscientiousness: creative but less organized. Neuroticism varies; Lauren becomes anxious as deadlines approach.

These profiles go a long way toward explaining the tension in meetings. Lauren's need for structure clashes with Sam's late drafts and Diego's preference for open-ended sessions. Grace's agreeableness hides disagreements until they surface later.

Measuring Traits

Traits are measured with inventories that ask people to rate statements, such as "I am always prepared," on a scale. Good inventories are reliable, giving consistent results over time, and valid, predicting behavior and matching observers' ratings. Ratings by people who know the person well add useful information, since self-reports can be biased.

Where Traits Come From

Bouchard et al. (1990) studied twins who had been separated early in life and raised in different homes. Identical twins reared apart were about as similar in personality as identical twins reared together, and the researchers estimated that about half of the variation in personality traits in their sample was associated with genetic differences. Shared family environment appeared to matter less than expected.

Heritability is often misunderstood. A heritability of about fifty percent does not mean half of Lauren's conscientiousness comes from genes. It means that, within the group studied, about half of the differences between people were associated with genetic differences. Heritability also depends on the environment: in a group with very similar environments, genetic differences account for more of the variation. And genes influence traits through biological systems, such as how strongly the brain responds to rewards or threats, which then interact with experience.

Heritability describes differences in a group, not the recipe for one person; Lauren's habits came from her genes and from every deadline she ever met.

Traits and Work

Barrick and Mount (1991) combined studies of job performance in a meta-analysis and found that conscientiousness predicted performance across all occupational groups studied, while extraversion predicted success in people-facing roles such as managers and salespeople. Lauren's conscientiousness is therefore an asset, and her frustration with missed deadlines is understandable. Diego's extraversion fits the collaborative parts of the work. Sam's openness supports creative tasks, even if his low conscientiousness makes deadlines difficult.

Traits Across Situations

Traits describe tendencies, not rules. Grace avoids conflict in team meetings but argues firmly with vendors who miss deadlines, because she feels responsible for the campaign's budget. Sam is late with internal drafts but always on time for client presentations. These patterns suggest that situations matter: people show their traits more strongly in some settings than others. A complete account of personality must explain both the stable tendency and the way it bends to circumstances.

Biology Beyond Genes

Biological approaches also look at the systems through which genes act. Differences in how strongly the brain responds to rewards may relate to extraversion, and differences in how readily the body's stress response activates may relate to neuroticism. Lauren's anxiety near deadlines, for example, may reflect a more reactive stress system. These links are still being studied, and they do not mean traits are fixed; habits, relationships and training can change how biology shows up in behavior.

Strengths and Limits

Trait approaches are well supported by research, describe personality efficiently and predict real outcomes. Their limits include describing more than explaining: knowing Sam is low in conscientiousness does not explain why, or how he might change. Traits also do not capture how behavior shifts across situations; Sam may be punctual for tasks he finds meaningful.

Using the Team's Differences

The team can use its traits rather than fight them. Lauren can own the timeline and set short check-ins, which gives Sam structure. Diego can lead brainstorming in a time-limited session with a clear goal. Grace can be invited to share concerns in writing before meetings, which suits her preference to avoid open conflict. Sam can take on the most creative analysis with interim deadlines broken into small steps. Talking openly about differences in style, rather than treating them as character flaws, reduces tension and helps each member see what the others contribute.

Conclusion

Trait and biological approaches explain much of this team's friction: stable differences in conscientiousness, extraversion, agreeableness and openness, partly heritable and clearly linked to work behavior. Research supports the Big Five as a valid description, shows genes contribute substantially to differences and links conscientiousness to performance. Used well, these insights help teams work with their differences instead of against them.

References

Barrick, M. R., & Mount, M. K. (1991). The Big Five personality dimensions and job performance: A meta-analysis. Personnel Psychology, 44(1), 1-26. https://doi.org/10.1111/j.1744-6570.1991.tb00688.x

Bouchard, T. J., Jr., Lykken, D. T., McGue, M., Segal, N. L., & Tellegen, A. (1990). Sources of human psychological differences: The Minnesota Study of Twins Reared Apart. Science, 250(4978), 223-228. https://doi.org/10.1126/science.2218526

McCrae, R. R., & Costa, P. T., Jr. (1987). Validation of the five-factor model of personality across instruments and observers. Journal of Personality and Social Psychology, 52(1), 81-90. https://doi.org/10.1037/0022-3514.52.1.81