Biomedical subjects

Dirk Wentura

Publications and source records attributed to Dirk Wentura.

11 recordsLinked to original sources

PubMed2006

Strategy effects counteract distractor inhibition: negative priming with constantly absent probe distractors.

It is an accepted, albeit puzzling finding that negative priming (NP) hinges on the presence of distractors in probe displays. In three experiments without probe distractors, the authors yielded evidence that response-biasing processes based on the contingency between prime and probe displays may have caused this finding. It is argued that it is of help in standard NP experiments to process the distractor in the prime display in order to prepare the response to the probe target. When this contingency was removed (Experiments 2 and 3), NP was reliably observed without probe distractors, whereas no NP emerged if the design contained the typical contingency (Experiment 1). For this reason, the data suggest that the absence of NP, which is usually observed under these conditions, may be due to a contingency-based component.

Adult↗

PubMed2006

Negative priming is stronger for task-relevant dimensions: Evidence of flexibility in the selective ignoring of distractor information.

The finding that in selective attention tasks responses to previously ignored stimuli are usually retarded is known as negative priming (NP). In previous studies it has been suggested that NP can depend on behavioural goals--that is, NP was observed only for task-relevant object dimensions. We extend these findings with two experiments demonstrating that stronger NP can be observed for task-relevant dimensions than for task-irrelevant dimensions (a) even if participants' tasks vary blockwise within an experiment and (b) if behavioural goals vary from trial to trial. These results suggest that selective NP is a much more flexible process than previously assumed.

Adult↗

PubMed2006

Artificially induced valence of distractor words increases the effects of irrelevant speech on serial recall.

In a game context, nonwords either were artificially associated with negative valence or were in some sense neutral or irrelevant. Subsequently, participants memorized target words in silence or while attempting to ignore the negatively valent, irrelevant, or neutral auditory distractor nonwords. The presence of distractor nonwords impaired recall performance, but negative distractor nonwords caused more disruption than neutral and irrelevant distractors, which did not differ in how much disruption they caused. These findings conceptually replicate earlier results showing disruption due to valence with natural language words and extend them by demonstrating that auditory features that may possibly be confounded with valence in natural language words cannot be the cause of the observed disruption. Explanations of the irrelevant speech effect within working memory models that specify an explicit role of attention in the maintenance of information for immediate serial recall can explain this pattern of results, whereas structural models of working memory cannot.

Adult↗

PubMed2005

Negative priming with masked distractor-only prime trials: awareness moderates negative priming.

The literature yields inconsistent evidence for negative priming (NP) following masked distractor-only prime trials. We contrast two different hypotheses on the inconsistent findings: one - which is most compatible with the temporal discrimination theory - that relates the sign of priming effects to the absence vs. presence of prime awareness and one -which is most compatible with the inhibition and episodic retrieval accounts - that relates the sign of priming effects to the prime event being categorized as a to-be-attended vs. to-be-ignored event. In two experiments, it turned out that participants' awareness of the masked stimuli caused the different results (with participants being not aware of the primes showing NP), whereas the factor prime color = probe target color vs. prime color = probe distractor color (i.e., the prime contains the to-be-attended vs. the to-be-ignored signal) did not moderate NP. These findings are discussed with regard to theories of negative priming and the debate on conscious vs. unconscious perception.

Adult↗

PubMed2005

Repeated masked category primes interfere with related exemplars: new evidence for negative semantic priming.

In 4 experiments, the authors found evidence for negatively signed masked semantic priming effects (with category names as primes and exemplars as targets) using a new technique of presenting the masked primes. By rapidly interchanging prime and mask during the stimulus onset asynchrony, they increased the total prime exposure to a level comparable with that of a typical visible prime condition without increasing the number of participants having an awareness of the prime. The negative effect was observed for only low-dominance exemplars and not for high-dominance exemplars. The authors found it using lexical decision (Experiments 1 and 2), lexical decision with a response-window procedure (Experiment 3), and the pronunciation task (Experiment 4). The results are discussed with regard to different theories on semantic priming.

Adult↗

PubMed2005

Retrieval of incidental stimulus-response associations as a source of negative priming.

Priming effects of ignored distractor words were investigated in a task-switching situation that allowed an orthogonal variation of priming and response compatibility between prime and probe. Across 3 experiments, the authors obtained a disordinal interaction of priming and response relation. Responding was delayed in the ignored repetition condition if different responses were required for identical stimuli in the prime and probe (negative priming). Repeating the prime distractor in the probe facilitated responding if the same response was required in the prime and in the probe (positive priming). The same pattern of results was replicated in a letter-matching task without task switching (Experiment 4). Findings lend support to a new model that explains negative priming in terms of an automatic retrieval of incidental stimulus-response associations.

Adolescent↗

PubMed2004

Underlying processes in the implicit association test: dissociating salience from associations.

The authors investigated whether effects of the Implicit Association Test (IAT) are influenced by salience asymmetries, independent of associations. Two series of experiments analyzed unique effects of salience by using nonassociated, neutral categories that differed in salience. In a 3rd series, salience asymmetries were manipulated experimentally while holding associations between categories constant. In a 4th series, valent associations of the target categories were manipulated experimentally while holding salience asymmetries constant. Throughout, IAT effects were found to depend on salience asymmetries. Additionally, salience asymmetries between categories were assessed directly with a visual search task to provide an independent criterion of salience asymmetries. Salience asymmetries corresponded to IAT effects and also accounted for common variance in IAT effects and explicit measures of attitudes or the self-concept.

Adult↗

PubMed2004

Valence of distractor words increases the effects of irrelevant speech on serial recall.

Participants memorized target words in silence or while ignoring neutral or valent (positive or negative) distractor words that could be either possessor-relevant or other-relevant. Distractor words impaired recall performance, but valent distractor words caused more disruption than neutral distractors, and negative distractors caused more disruption than positive distractors. The results are problematic for explanations of the irrelevant speech effect within working memory models that do not specify an explicit role of attention in the maintenance of information for immediate serial recall.

Adult↗

PubMed2003

Estimating the valence of single stimuli: a new variant of the Affective Simon Task.

In this article, a modified variant of the Affective Simon Task (AST; De Houwer & Eelen, 1998) is presented as a measure of implicit evaluations of single stimuli. In the AST, the words "good" or "bad" have to be given as responses depending on the color of the stimuli. The AST was combined with an evaluation task to increase the salience of the valence of the presented stimuli. Experiment 1 investigated evaluations of schematic faces showing emotional expressions. In Experiment 2 we measured the valence of artificial stimuli that acquired valence in a game context during the experiment. Both experiments confirm the validity of the modified AST. The results also revealed a dissociation between explicit and implicit evaluations.

Adult↗

PubMed2003

Age stereotypes in younger and older women: analyses of accommodative shifts with a sentence-priming task.

A sentence-priming technique was used to examine whether older women (N = 39) share a more positive view of aging than younger women (N = 35). Situationally specified statements about older and younger persons were presented, followed either by a semantically related word, an unrelated word of the same valence, or a nonword. The accessibility of target words was measured by reaction times in a lexical decision task. Whereas a semantic priming effect for negatively connoted materials emerged for both groups, a priming effect for positively connoted materials was found for older women only. Furthermore, an affective priming effect was found for the older group, i.e., older women tended to respond relatively faster (slower) to semantically unrelated positive (negative) words following a sentence about an older person. The results are discussed within a coping-theoretical framework.

Adult↗

PubMed2003

Immunizing the self: self-concept stabilization through reality-adaptive self-definitions.

Processes of self-concept immunization are introduced as a way of reconciling self-concept protection against threatening information with the necessity of acknowledging own failure or losses. Self-immunization works by adaptively changing the subjective operationalization of personal traits, such that skills that individuals believe themselves to be good at are conceived as highly diagnostic, whereas skills that persons do not believe they possess are considered less diagnostic. Three studies are presented to investigate this stabilizing process. Correlational as well as experimental and longitudinal data support the assumption that self-immunization stabilizes central and abstract aspects of the self-concept without ignoring negative information on concrete skills.

Achievement↗