Jeffrey D. Williamson

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In a complete between-subjects design, 576 respondents judged covariations of problems framed around height, weight, and body fat. A verbal measure was used, consisting of propositional statements representing relationships between two of the variables, as well as two types of response options: true or false, and a 7-point, bipolar, Likert-type scale.(More)
The authors evaluated subjective estimates of the relationship between freedom and responsibility under predictions made in accordance with cognitive-experiential self-theory (CEST; V. Denes-Raj & S. Epstein, 1994; S. Epstein, A. Lipson, C. Holstein, & E. Huh, 1992; S. Epstein, R. Pacini, V. Denes-Raj, & H. Meier, 1996; L. A. Kirkpatrick & S. Epstein,(More)
Most of the research concerned with the illusory correlation is modeled after the seminal work of D. L. Hamilton and R. K. Gifford (1976). However, S. A. Haslam and C. McGarty (1994) have voiced concerns over the dependent measures used within this paradigm. Therefore, in this study, the authors tested a new dependent variable that has high face validity.(More)
BACKGROUND Patient characteristics are associated with adherence, which has implications for planning clinical research or designing payment systems that reward superior outcomes. It is unclear to what extent clinician efforts to improve adherence can attenuate these associations. METHODS To identify factors predicting visit and medication adherence in(More)
College students' intuitive judgments about covariations between height, weight, and body fat were assessed in three experiments using responses to a series of propositional statements as the dependent variable. In Exp. 1, judgments were rendered without explicit exposure to a prior database. In Exps. 2 and 3, however, databases were studied prior to these(More)
Intuitive judgements about covariations of length, weight, and width were assessed in two experiments using a series of propositional statements. In Exp. 1, only a priori judgements were rendered, whereas in Exp. 2 blindfolded participants physically manipulated and described a series of objects varying on these dimensions before rendering their judgements.(More)
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