Zeitschrift fur experimentelle Psychologie : Organ der Deutschen Gesellschaft fur Psychologie最新文献

The present paper analyzes the semantic features of positive and negative emotion names. In a pretest the 12 most typical positive rated emotion names were selected by means of a free listing of 70 Ss. These 12 items were presented to 42 Ss as stimulus words for a free association test. From this association data overlap coefficients were computed and analyzed by means of nonmetric multidimensional scaling. It was possible to fit the features "Soziale Nähe-Soziale Distanz" (social distance) und "Körperhaftigkeit" (Quality of body feeling) in the two-dimensional euclidian solution. In the same way as described above, an experiment was carried out with 11 negative emotion names. In this case it was possible to fit in the same two features and the feature "Aktivation" (activation).

According to Baumeister (e.g. 1985) "choking under pressure" means showing a suboptimal performance when under pressure, despite a high motivation to perform well. Factors that can exert pressure on performers ("pressure variables") include competition, the reward to be gained, the expectation of negative consequences, the presence of spectators etc. However, "choking" can also occur when public expectations (e.g., of the audience) are positive. Baumeister et al. (1985) showed this in two experiments. In the present study an experimental design (a 2 x 2 design) was developed to examine this question in a sport context. Under various conditions of public expectations ("positive" vs "no") and private expectations ("positive" vs "negative"), 60 university students repeatedly had to do a motor task on a rowing ergometer. The main results were: When the public expects success, but not the performing person, then the level of performance decreases. Under the condition of "public expectation of success" a better performance was only shown when the private and the public expectations corresponded with each other.

Pictures often do not appear distorted even when viewed at oblique angles. Three hypotheses have been put forth to explain this robustness of virtual space toward affine transformations. First, array specificity holds that the perception of depicted space is fully specified by the information available at the point of observation. Second, the notion of a compensatory mechanism involves an unconscious recreation of the scene according to the original viewpoint. Third, the indiscrimination hypothesis denies the ability of the visual system to resolve or detect affine transformations up to a certain degree. Three experiments were conducted to investigate these claims. Using a double projection technique devised by Cutting (1987), Experiment I showed that observers are able to discriminate and compensate, to some degree, for affine transformations if information about the projection surface is available. However, observers relied on relative image velocities rather than reconstructing the object. In Experiment 2 additional observer motion was simulated. In single and double projection trials that required more difficult judgments of object rotation, compensation was poor and observers seemed to rely on local cues. Finally, real and simulated rotation of the projection surface revealed that observers are able to compensate for only one primary projection surface slant. The results reject the indiscrimination hypothesis and support the notion of array specificity.

Research on pain-related cognitions has up to now predominantly relied upon introspective questionnaire data. Experimental cognitive psychology offers an alternative way of access to the cognitive aspects of chronical pain. Building on the assumption that information-processing is in part uncontrolled, automatic and pre-attentive, similar processes are also expected to be relevant for pain-relevant cognitions and to be involved in health-related convictions and in coping strategies that can be assessed with questionnaires. Cognitive-psychological research has established the "hindsight bias" as a robust phenomenon that occurs uncontrolled and automatically in diverse contexts when a prior judgment or prediction is assimilated to information received later on. The hindsight bias may be regarded as a manifestation of a universal cognitive mechanism, meaning that information (including information about emotional states) available at a given time will change the memory of prior judgments or of predictions of future events and results of behavior. Cognitive biases similar to the hindsight effect have been demonstrated in chronical pain patients. The present work elaborates the hypothesis that pain patients differ from other groups in the size of the hindsight bias and in its composition and outlines how it can contribute to the chronification of pain. Data from a hindsight-bias experiment comparing pain patients, psychiatric patients and students are analyzed using alternatively a traditional global hindsight bias score ("Hell-Index") and a multinomial modelling approach. The hindsight-effect was observed in the usual extent in the student control group, but was significantly greater in the pain group and absent in the psychiatric sample. In addition to this global finding, multinomial modelling revealed group differences in specific model parameters. This method of analysis thus proved as promising for the assessment of cognitive aspects of clinical disorders.

The predictions provided by the range-frequency model and the adaptation-level theory were compared in respect of size judgments in an averbal two-category experiment. Squares of different sizes were presented in two different frequency distributions. After a two stimulus-two choice training, in which the subjects (N = 64) learned to which of the two response categories a relative small or large square belonged, a generalization context-series test followed. The two test series represented the two different frequency distributions used (the arithmetic mean was either smaller or larger than the median or midpoint). The percentage of large responses was registered. Furthermore, to investigate which experimental design would be appropriate for this research paradigm, the study was carried out using both a between-subjects and a within-subjects design. For the two experimental designs, the results pointed to a confirmation of the predictions provided by the adaptation-level theory (D. R. Thomas, 1993) but not the range-frequency model (Parducci, 1983, 1995).

The paper gives a brief overview of five experimental approaches in which memory processes were studied by means of event-related brain potentials (ERPs). Some of the results were already published in English (Study 1), while others are new and will be reported in greater length as full paper elsewhere (Studies 2, 3, 4, and 5). Study 1 revealed that retrieval of information from episodic long-term memory is accompanied by a systematic slow negative potential. The topography of this slow wave depends on the quality of the reactivated information (spatial vs. verbal), and its amplitude reflects the difficulty of the retrieval process. In experiment 2 ERPs were recorded while subjects acquired either explicit or implicit knowledge about a sequential stimulus-response pattern. The data suggest that explicit learners who posses verbalizable knowledge about sequential dependencies have formed both perceptual and motor representations, while implicit learners have formed motor representations only. In study 3 fact retrieval in mental arithmetic was activated by a verification task. Incongruent solutions evoked an arithmetic N400-effect whose amplitude varied with the associative distance between an expected and an actually perceived solution to a multiplication problem. In study 4 ERPs were recorded during mental rotation tasks. A set of experiments revealed that mental rotation is always accompanied by a systematic negative variation over the parietal cortex. The amplitude of this "rotation specific negativity" increases with an increasing angular disparity between a perceived sign and its normal upright template. It was shown that this negativity is functionally distinct from a P300-complex which is often superimposed on it within the same latency window. Finally, study 5 examined ERPs in a sentence reading task in which grammatically legal but infrequent sentence constructions had to be processed. A left-anterior negativity was observed whenever an explicit case marker (the definite article in German) signalled a nominal phrase at a noncanonical position. The LAN phenomenon appears to be a manifestation of a syntax processor which performes a first-pass formal analysis of a sentence and which possibly allocates working memory resources whenever a word cannot be assigned immediately to an expected propositional role.

In the paradigm of the evaluative decision task, K. C. Klauer, C. Rossnagel and J. Musch (1997) have been able to show that in affective priming, contrary to semantic priming, a list context effect occurs already at a short SOA, whereas it does not occur at long SOAs. As a possible explanation of this surprising context effect at a short SOA, a matching mechanism was proposed. The theoretically important consistency proportion effect at an SOA of 0 ms could be replicated in an experiment with 40 participants. The results of a subsequent recognition test, however, suggest that the consistency proportion effect is not mediated by the supposed relatedness-checking mechanism. The Stroop paradigm may provide a better theoretical framework for the explanation of affective priming than the previously assumed analogy to semantic priming.

Studies dealing with the implicit causality in verbs have shown that even minimal descriptions of interpersonal events (e.g. "Michael apologizes to Peter" or "Vera admires Karen") systematically elicit attributions toward the sentence subject or sentence object. However, in the majority of existing studies, the stimulus materials (i.e., interpersonal verbs) have not been selected randomly: Verbs were selected either because they had often been used in previous studies, or they were counterbalanced with regard to a number of additional criteria (valence, derivational form, etc.), and therefore, a truly random sampling of stimulus verbs were impossible. In the present study, the criteria for selecting interpersonal verbs are varied in order to compare two groups of verbs, namely, verbs which have been used very often in previous studies versus a random sample of interpersonal verbs. It is shown that the classical findings concerning the perceived causes of interpersonal verbs are less pronounced for the random sample than for the non-random sample of interpersonal verbs. However, even for the random sample of verbs, an impressive amount of variance in causal attributions is explained by different verb types.

According to Brown and VanKleeck (1989), the perceived causes of interpersonal events are mediated by two kinds of factors: First, the interpersonal verbs used to describe these events carry implicit information with regard to the question of which one of the potential interaction partners has caused the event. Second, explanations of interpersonal events are governed by the principle of balance. For example, positive events are predominantly explained by positive causes, and negative events by negative causes. In addition, the interaction of the two mechanisms also has important consequences concerning the explanation of social events: (1) In balanced triads, an event is ascribed to the interaction partner who is seen as the causally dominant one (according to the implicit causality of the verb that is used to describe the interaction). (2) However, this pattern of data is reversed for unbalanced triads: here, the event is ascribed to the interaction partner who is seen as the causally less dominant one, according to the implicit causality of the verb. The present study addresses the question of whether this attributional shift can be explained in terms of corresponding changes in perceived covariation information. Results indicate that the perception of consensus and distinctiveness indeed correspond to the causal attributions as they are obtained for different kinds of triads. Thus, classical attribution variables are regarded as promising candidates in order to explain these attributional shifts for balanced versus unbalanced events.