Interpersonal Decentering and Person-Situation Interaction in the Thematic Apperception Test: Is It all in the Cards? What's the Story?

Assessors using storytelling assessment techniques have debated the relative importance of picture imagery (card pull) versus story content for interpreting clients' stories. This study used generalizability theory to compare sources of variance in scores for Feffer's Interpersonal Decentering as a function of persons, cards, raters, or interactions. Representing situational activation of mature role-taking (mentalizing of interpersonal processes), decentering activity should differ across interpersonal situations according to the social role norms involved, resulting in more variance due to card pull than for previously studied scoring systems. Decentering scores from stories told to heterosexual romantic-pull pictures were compared with those for other pictures and with scores from romantic versus nonromantic stories to identify score variance explained by card pull and story content. Considering cards as analogs for life situations, person-card interaction explained more decentering variance (53.7%) than did other effects. Heterosexual romantic-pull pictures stimulated more mature decentering than others; story content did not explain significant variance. Women told more mature decentering stories to heterosexual romantic-pull pictures than to other pictures, and more so than men did. Finding strong person-card interaction illuminates typically low internal consistency for content-based scoring systems. Recommendations for clinicians include implications for card selection and story content interpretation.