Robins+et+al.++2001

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Unformatted text preview: raversion Agreeableness Conscientiousness Neuroticism Openness Age 18 M (SD) Age 22 M (SD) Mean changea 3.47 (.62) 3.57 (.54) 3.53 (.56) 2.99 (.68) 3.58 (.59) 3.49 (.60) 3.81 (.54) 3.69 (.61) 2.66 (.68) 3.71 (.57) + .03 + .44* + .27* – .49* + .22* Decreasedb 8% 2% 6% 23% 2% Stayed the sameb 83% 84% 81% 73% 91% Increasedb 9% 14% 13% 4% 7% Rank-order stabilityc .63* (.76) .60* (.78) .59* (.72) .53* (.63) .70* (.92) Note. N = 270. * p < .05. aMean-level change in standard score units (i.e., Cohen’s d). bPercentage of individuals who decreased, stayed the same, or increased on each dimension, according to the Reliable Change index (see text). The expected frequencies are 2.5%, 95%, and 2.5%, respectively. The observed frequencies differ from the expected frequencies for each of the Big Five dimensions (χ2 values ranged from 22.6 to 470.1, all ps .05). cCorrelations between age 18 and age 22 scores. Values in parentheses are disattenuated for measurement error (based on coefficient alpha). 628 Robins et al. Appendix). Thus, the college experience did not serve to broaden or reduce the range of individual differences in personality. We also examined change by categorizing people as having stayed the same if they were within the 95% confidence interval around the RC index, or as having increased or decreased if the probability associated with their RC score was less than 5%. These analyses suggested that there was little change in personality for the majority of participants (see Table 1). For example, 84% of the sample had similar levels of Agreeableness at each time point. However, Neuroticism showed less stability; roughly 35% of the sample scored outside the expected range. Overall, 64% of the sample changed on at least one of the five dimensions according to the RC index. Rank-Order Stability of Personality Rank-order stability coefficients for the Big Five dimensions were medium to large in size, ranging from .53 for Neuroticism to .70 for Openness. These values are comparable to the mean rank-order stability estimat...
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