Biomedical subjects

Axel Buchner

Publications and source records attributed to Axel Buchner.

3 recordsLinked to original sources

PubMed2003

Implicit Association Test: separating transsituationally stable and variable components of attitudes toward gay men.

Implicit attitudes are conceived of as formed in childhood, suggesting extreme stability. At the same time, it has been shown that implicit attitudes are influenced by situational factors, suggesting variability by the moment. In the present article, using structural equation modeling, we decomposed implicit attitudes towards gay men into a person factor and a situational factor. The Implicit Association Test (Greenwald, McGhee, & Schwartz, 1998), introduced as an instrument with which individual differences in implicit attitudes can be measured, was used. Measurement was repeated after one week (Experiment 1) or immediately (Experiment 2). Explicit attitudes towards gay men as assessed by way of questionnaires were positive and stable across situations. Implicit attitudes were relatively negative instead. Internal consistency of the implicit attitude assessment was exemplary. However, the within-situation consistency was accompanied by considerable unexplained between-situation variability. Consequently, it may not be adequate to interpret an individual implicit attitude measured at a given point in time as a person-related, trait-like factor.

Adult↗

PubMed2003

Further evidence for systematic reliability differences between explicit and implicit memory tests.

Meier and Perrig (2000) as well as Buchner and Wippich (2000) have shown that simple dissociations between explicit and implicit memory measures need not reflect functional dissociations of hypothetical underlying memory systems. Instead, such dissociations may also result from the fact that some widely used implicit memory measures are simply less reliable than the explicit measures with which they have been compared. We extend this argument in two ways. First, we show that illusion-based memory measures such as the priming measures derived from fame and preference judgement tasks are also subject to the reliability problem. Second, we show that yes-no and two-alternative forced-choice paradigms should, and in fact do, yield virtually identical results as far as the reliability of the memory tests is concerned.

Adolescent↗

PubMed1995

Toward unbiased measurement of conscious and unconscious memory processes within the process dissociation framework.

L.L. Jacoby's (1991) process dissociation framework has been welcomed as a tool for differentiating controlled and automatic cognitive processes. Several variants of the original process dissociation measurement model are integrated in this article, and it is shown that the model ignores guessing and, hence, response bias. An extension of the original model is suggested that includes guessing parameters. The original model and the extended model are evaluated empirically. In 3 experiments using a yes-no recognition task, response bias was manipulated in various ways. The original model falsely attributes effects of response biases to either controlled or uncontrolled processes or to both. The extended model, in contrast, results in estimates of the contributions of controlled and uncontrolled memory processes that are relatively unaffected by response biases. The extended model is recommended as a measurement tool.

Adult↗