The T?lz Temporal Topography Study: Mapping the visual field across the life span. Part I: The topography of light detection and temporal-information processing

Temporal performance parameters vary across the visual field. Their topographical distributions relative to each other and relative to basic visual performance measures and their relative change over the life span are unknown. Our goal was to characterize the topography and age-related change of temporal performance. We acquired visual field maps in 95 healthy participants (age: 10?C90?years): perimetric thresholds, double-pulse resolution (DPR), reaction times (RTs), and letter contrast thresholds. DPR and perimetric thresholds increased with eccentricity and age; the periphery showed a more pronounced age-related increase than the center. RT increased only slightly and uniformly with eccentricity. It remained almost constant up to the age of 60, a marked change occurring only above 80. Overall, age was a poor predictor of functionality. Performance decline could be explained only in part by the aging of the retina and optic media. In Part II, we therefore examine higher visual and cognitive functions.     

Ideology,Fear of Death,and Death Anxiety

Ideological beliefs have long attracted the attention of social psychologists, who have investigated their genesis as well as their influence on a host of social phenomena. Conservatism, from the Motivated Social Cognition framework, stems from epistemic and existential needs of the individual, and notably the fear of death. However, Terror Management Theory proposes a view of conservatism and its contrary, liberalism, as equivalent cultural worldviews, equally fit to fulfill such needs. In the present contribution, results are presented from five studies, which test the contrasting hypotheses derived from these two perspectives. A new perspective is considered that accounts for these and previous findings.     

Pictorial context and the recall of pronoun sentences

Summary Acting on the assumption that pictures affect the processing of sentences only when providing additional information, the authors used pictures, which in an earlier experiment had failed to influence the retention of noun sentences, as illustrations to semantically undefined pronoun sentences, thus establishing a distinct information gradient between sentence and picture. These pronoun sentences were presented to 48 subjects for recall, in four pictorial conditions: without picture, with unambiguous picture, with subject-ambiguous, and with object-ambiguous picture. As hypothesized, picture-less pronoun sentences were more poorly recalled than picture-enriched pronoun sentences. Moreover, sentences accompanied by subject-ambiguous pictures, in which the grammatical subject could not be clearly identified, scored lower than the same sentences with unambiguous or object-ambiguous pictures. The findings invite a communication-theory analysis of the experimental situation, for which Searle's theory of speech acts is invoked.The authors gratefully acknowledge the assistance of Mr. B. Jankowski in the translation of this paper from an original German version.     

Limits to participative leadership: Task,structure and skill as contingencies-a German-British comparison

The research investigated the relationship between managerial decision-making and a set of specified contingent situational factors: decision type, perceived skill requirements and objective skill inputs. The study was based on 663 German and British managers in two interlocking senior management levels of 37 large enterprises. The data were collected by means of Group Feedback Analysis as part of a large study of managerial decision-making in eight countries. The results show a significant (p = <.05) relationship between the choice of decision styles and the postulated contingency variables. Only 1 % of 615 senior managers consistently use a single decision style, more than two-thirds use four or five different styles. Very large variations occur as a function of different decision tasks, perceived skill requirements and objective skill availability. There are differences between the relatively well matched samples of German and British managers, but they are less significant than the broadly similar way in which both samples respond to the particular contingencies under investigation. The results are interpreted in the context of an open systems contingency framework. Their action implications are seen to suggest a link with sociotechnical theory on job design and wider issues of organisational and social policy.     

No prevalence of right-left over top-bottom spatial codes

Reaction time is known to depend on spatial stimulus-response compatibility in both the horizontal and the vertical dimensions. However, if both dimensions are varied in the same task, horizontal but not vertical compatibility affects performance, even if subjects are instructed to attend to the vertical dimension only (Nicoletti & Umiltà, 1984). Experiment 1 compared the effect of horizontal and vertical instructions in a task with left- versus right-handed key responses placed at a top versus bottom location. A horizontal-prevalence effect was observed only with a horizontal, and not with a vertical, instruction. This suggests that subjects might not have heeded the vertical instruction in the Nicoletti and Umiltà study but instead attended to the horizontal dimension. Experiment 2 did not yield any horizontal prevalence with one-handed responses (joystick movements). This indicates that top-bottom codes become ineffective only if the responses suggest an exclusively horizontal response coding. In sum, results demonstrated multiple spatial coding of stimuli and responses under appropriate conditions and suggest that the right-left codes do not dominate the top-bottom spatial codes.     

Market forces,negotiator frames and transaction outcomes

Although implicit framing differences have been advanced as an explanation of the buyers advantage, two necessary preconditions must be met to sustain this model: a demonstration that negatively-framed negotiators are advantaged in negotiations and that buyer role labels invoke a negative frame. A modification of Neale, Northcraft, Magliozzi and Bazerman s (1986) simulation created a role-neutral setting in which positively-framed negotiators bargained against negatively-framed negotiators, thus testing the first of these preconditions. Experiment 1 found no differences in the outcomes of positively- and negatively-framed negotiators, a finding that could be attributed to relatively low market competitiveness. A second experiment, by creating power imbalanced negotiation markets, sought to increase market distributiveness and strengthen framing effects. Results showed that both high power and negatively-framed negotiators were significantly advantaged, providing conditional support for the implicit framing model, However unlike role, frame interacted with power suggesting that the two variables are not functionally equivalent. These findings are interpreted to suggest that factors other than implicit framing differences account for the buyers advantage. More generally these results suggest that frame is responsive to situational variables and that such variables, by influencing negotiation processes, mediate the relationship between negotiator frames and negotiation outcomes.     

Inverting the Simon effect by intention

Summary The Simon effect indicates that choice reactions can be performed more quickly if the response corresponds spatially to the stimulus - even when stimulus location is irrelevant to the task. Two experiments tested an intentional approach to the Simon effect that assigns a critical role to the cognitively represented action goal (i. e., the intended action effect). It was assumed that the direction of the Simon effect depends on stimulus-goal correspondence, that is, that responses are faster with spatial correspondence of stimulus and intended action effect. Experiment 1 confirmed that the direction of the Simon effect was determined by spatial correspondence of stimulus and intended action effect, the latter having been manipulated by different instructions. Experiment 2 indicated that effects of correspondences unrelated to the action goal (i. e., stimulus to hand location or to anatomical mapping of the hand), contributed additively to the resulting Simon effect. It is discussed how current approaches to the Simon effect can be elaborated to account for these results.