Home > Codebook > Measures > Emotionality Activity, Sociability and Impulsivity inventory (EASI) - Subject Baseline

Emotionality Activity, Sociability and Impulsivity inventory (EASI) - Subject Baseline

This measure appears in the following time-points: Baseline.

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Related Construct

Description of Measure

The EASI is a measure of temperament that was modified for this study to assess the adolescent's internal emotionality (Buss & Plomin, 1984). This measure is only used at the baseline interview; it is not repeated at follow-up interviews. Examples of items are "I am almost always calm-nothing ever bothers me," and "I tend to be nervous in new situations." The scale contains 14 items to which participants respond on a 5- point Likert scale ranging from "Strongly disagree" to "Strongly agree". Higher scores indicate greater emotionality.

Confirmatory factor analyses were conducted to determine whether a single of two-factor solution might best fit the data. These analyses indicated that a two-factor model could be made to fit the data, allowing for several correlated error terms; but this solution had correlated error terms that crossed the two factors and the reliability of one of the factors was very low. This solution was not seen as logically acceptable. A single factor solution using all fourteen items did not fit the data. A single factor solution (with some correlated error terms) that used only nine of the items, however, did fit the data adequately (CFI=0.945; RMSEA=0.043). The measure was found to have adequate internal consistency (alpha = .67). This nine-item scale is the score computed here. Most of the items excluded refer to anger or external manifestations of being upset. As a result, the calculated score mainly indicates internal, rather than external, emotionality.

We compute the following summary variable:

References