Self and Observer Reports on Personality Inventory Scales

Self vs. Observed Reports

This section discusses the use of combined self and observer reports in personality assessment, building upon the importance of both. It delves into whether individuals know themselves better than others and how different data sources can inform us about personality, including the complexities of its measurement.

Combining Self and Observer Reports

This approach involves collecting self-reports from target individuals while also gathering observer reports about the same individuals from others. For example, administer the Big Five Inventory to both the target person and observers who know the target person. This process helps in gauging the agreement between self and observer reports, which provides insight into the validity of personality measures.

Agreement and Validity

High agreement between self and observer reports supports the construct validity of personality assessments. For instance, studies using the Five-Factor Inventory (FFI) show correlations of approximately 0.6 between self-reports and spouse ratings, and around 0.4 with ratings from friends or neighbors. The higher correlation with spouses suggests that those who know an individual better tend to have a more similar perception of their personality traits.

0.6>0.40.6 > 0.4

Similarly, the HEXACO Personality Inventory-Revised (HEXACO-PI-R) shows correlations between 0.4 and 0.6 among college students and their observers. This agreement demonstrates the convergent validity of the scale, indicating that both self and observer reports converge on similar assessments of personality traits like extraversion.

Addressing Potential Biases

It's important to consider that agreement between self and observer reports could stem from shared inaccurate opinions rather than accurate assessments. To address this, compare observer reports from multiple, unacquainted observers from different contexts. This helps to differentiate between genuine agreement and shared biases.

Studies on Target-Observer Agreement

Oltmanns, Funder, et al. Study

This study examined target-observer agreement across the Big Five personality traits (neuroticism, extraversion, openness, conscientiousness, and agreeableness). The researchers gathered data from targets, their parents, college friends, and hometown friends.

The findings indicated:

  • Significant agreement between self-reports and reports from parents (correlations ranging from 0.34 to 0.5).
  • Similar agreement levels between self-reports and reports from college friends (correlations ranging from 0.34 to 0.53).
  • Lower agreement between self-reports and reports from hometown friends, especially when considering the average correlations.

When comparing the average correlations, the study revealed that college friends know targets almost as well as parents do, whereas hometown friends have a less accurate perception of the target's current personality. This difference likely arises from the fact that individuals often change as they move away from their hometowns and experience new environments during college.

Funder et al. Study

This study focused on inter-observer agreement, examining how much observers agree among themselves about a target person's personality. The researchers analyzed data from:

  • Parents and college friends
  • Parents and hometown friends
  • College and hometown friends
  • Two college friends
  • Two parents
  • Two hometown friends

The results showed that observers from different contexts (e.g., parents and college friends) agreed less about the target's personality compared to observers from the same context (e.g., two college friends). This suggests that observers who know the target from the same context may share similar biases in their judgments.

Contextual Influence

The context in which observers know the target person significantly impacts the level of agreement among observers. Correlations were generally higher among observers from the same context, indicating that shared experiences and perspectives can lead to greater consensus in personality assessments. This highlights the context-dependent nature of observer reports and the importance of considering the observer's relationship to the target person.

Who Knows You Best?

Self-reports and observer reports offer different perspectives on personality, influenced by factors such as the observer's closeness to the target, the contexts in which they have interacted, and the degree of agreement or disagreement across these contexts. The debate remains: do people know themselves better than anyone else knows them?

Arguments for Self-Knowledge

Some researchers argue that individuals possess unique self-knowledge because they have access to their internal thoughts, feelings, and experiences across all situations. They have known themselves for their entire lives and have a comprehensive understanding of their own motivations and behaviors.

Arguments Against Self-Knowledge

However, self-knowledge can be limited by reporting biases and an overload of information. Individuals may not always be objective judges of themselves, and others who observe them from the outside may provide more unbiased assessments.

Kola et al. Study

This study suggests that peers can sometimes be better predictors of behavior than self-reports. By aggregating personality descriptions from self-reports, observer reports of the target, and observer reports of another person, the researchers found that observer reports were often better at predicting behaviors such as withdrawing nervously or acting domineering. These findings indicate that self-reports may be influenced by biases or a lack of self-awareness.

Combining Reports

Combining self and observer reports can lead to more accurate predictions of behavior. While both types of reports have validity, observer reports may sometimes be more reliable, particularly when self-reports are affected by biases or gaps in self-knowledge. Therefore, relying solely on self-reports may not always be the most effective approach to describing and predicting personality.

The Self-Other Knowledge Asymmetry (SOKA) Model

Mercier and Karpstein proposed the SOKA model to explain when others know us better than we know ourselves. This model posits that the accuracy of self and observer reports in predicting behavior depends on the type of traits being considered.

Key Dimensions

The SOKA model distinguishes between two key dimensions:

  • Observability: This refers to how easily a trait can be observed by others. Traits that are more internal, such as thoughts and feelings, have low observability, while external traits, such as overt behavior, have high observability.
  • Evaluativeness: This refers to whether a trait has an evaluative element, such as laziness or intelligence. Traits with high evaluativeness are more subject to biases in self-reports due to social desirability concerns.
Implications

The model suggests that self-reports are more accurate for traits with low observability and low evaluativeness, while observer reports are more accurate for traits with high observability or high evaluativeness.

Supporting Evidence

In a study designed to test the SOKA model, researchers examined the accuracy of self and friend ratings for different traits. The results indicated:

  • For traits with low observability and low evaluativeness (e.g., anxiousness), self-reports were more accurate than friend reports.
  • For traits with high observability and low evaluativeness (e.g., talkativeness), friend reports were slightly more accurate than self-reports.
  • For traits with high evaluativeness and low observability (e.g., intelligence), friend reports were much more accurate than self-reports.

These findings support the SOKA model's prediction that the accuracy of self and observer reports depends on the observability and evaluativeness of the traits being assessed. The model effectively accounts for biases in self-reports and highlights the importance of considering different types of traits when evaluating personality assessments.

Limitations and Biases

Both self and observer reports are subject to biases that can affect their accuracy. Social desirability bias, for example, can lead to socially desirable responses in self-reports. Additionally, observer reports may be influenced by preconceived notions or biases, such as parents overestimating the positive aspects of their children's personalities.

Conclusion

Studying personality traits requires an understanding of how self and observer reports provide different sources of information. The SOKA model offers a valuable framework for understanding these differences. The agreement between observer reports matters and depends on whether people know you from the same or different settings, highlighting the importance of considering the context of observer assessments.

Key Takeaways
  • Self and observer reports show fairly high levels of agreement, but they are not perfectly accurate.
  • Self and observer reports may be differently accurate for different personality traits.
  • Observability and evaluativeness of traits influence the accuracy of self versus observer reports.
  • Traits with low observability and low evaluativeness are better predicted by self-reports.
  • Traits high in evaluativeness are better predicted by observer reports.