Facing immortality

This study is primarily a call to philosophers to attend the concerns raised by the increasing possibility of indefinitely extended human life. While these concerns are largely moral and socio-political, questions arising from this possibility are seen to involve other philosophical areas, including epistemology. Starting with the age-old desire for extended, enjoyable life, possible strategies for realizing such life are considered. Such realization is shown to conflict with the desire for children. Various reasons for choice between the alternatives of indefinitely extended life and what is currently understood to be a normal life, including the possibility of offspring, are examined. Competing social visions are sketched for the purpose of resolving this dilemma. It is argued that humanity's likely choice from among the competing social sketches favors the decision for extended life against that for limited lifespan with the possibility of children. Assuming that the extended life will be a life of learning leads to epistemological considerations regarding what is to be learned.     

Location specificity in response selection processes for visual stimuli

We used the psychological refractory period paradigm, in which participants respond to two successive tasks (T1 and T2). We created in T2 spatial and color Simon effects, known to be caused by response selection processes. Previous studies in which the spatial Simon effect was manipulated in T2 showed that this effect was underadditive, with stimulus onset asynchrony (SOA) between the targets for T1 and T2. In Experiment 1, we replicated these results with two versions of the spatial Simon effect. In contrast, in Experiment 2 we manipulated two versions of a color Simon effect, revealing an additive relation between the color Simon effect and SOA. These results suggest that the underadditivity obtained with the spatial Simon effect is due to its spatial nature, and that space may play a unique role in response selection processes.     

A Comment on Gonzalez's “Effects of a Theory-Based,Peer-Focused Drug Education Course”

Gonzalez (1990), in an unequal-groups quasiexperiment drug education study, stated that because he used the statistical procedure of analysis of covariance, any differences that existed in the pretest scores have been controlled. Not true. This makes his results difficult to interpret. Furthermore, no standard deviations or pretest means are reported, and, thus, no effect size can be calculated to include the results of this study in a meta-analysis.     

The effect of pre-cueing on spatial attention across perception and action

It is well established that processes of perception and action interact. A key question concerns the role of attention in the interaction between perception-action processes. We tested the hypothesis that spatial attention is shared by perception and action. We created a dual-task paradigm: In one task, spatial information is relevant for perception (spatial-input task) but not for action, and in a second task, spatial information is relevant for action (spatial-output task) but not for perception. We used endogenous pre-cueing, with two between-subjects conditions: In one condition the cue was predictive only for the target location in the spatial-input task; in a second condition the cue was predictive only for the location of the response in the spatial-output task. In both conditions, the cueing equally affected both tasks, regardless of the information conveyed by the cue. This finding directly supports the shared input-output attention hypothesis.     

Implicit sequence learning based on instructed task set

How does the way we code and control actions influence automatic skill acquisition processes? Wenke and Frensch (2005) showed that instructions can lead participants to code spatial responses based on color. Here, we tested in 3 experiments to what extent response labeling and instruction-based response coding can determine what is learned in implicit sequence learning. Instructions mapped 4 gray shape stimuli to 1 of the 4 keys each in a serial reaction task, referring to the keys in terms of either their color or their spatial location. In Experiments 1 and 2 we found that people in the color instruction conditions used color for action control and acquired sequence knowledge containing color: They were susceptible to irrelevant stimulus colors at transfer and could transfer color sequence knowledge to a new arrangement of response positions and fingers, whereas participants who had received spatial instructions could not. Implicit sequence learning was thus surprisingly flexible. Depending on whether an arbitrary nonspatial response feature was used or not used to explain the stimulus-response mappings, we either found or did not find evidence that this feature became part of action control and sequence learning. Furthermore, Experiment 3 suggested that response position might become part of the sequence knowledge even if instructions do not emphasize this response feature. Together, the findings suggest that implicit sequence learning is based on action control, which in turn strongly, but not entirely, depends on which response features are used to explain the stimulus-response mappings in the instructions. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

Subjective confidence in perceptual judgments: a test of the self-consistency model

Two questions about subjective confidence in perceptual judgments are examined: the bases for these judgments and the reasons for their accuracy. Confidence in perceptual judgments has been claimed to rest on qualitatively different processes than confidence in memory tasks. However, predictions from a self-consistency model (SCM), which had been confirmed for general-information questions (Koriat, 2010) and social attitudes (Koriat & Adiv, 2010), are shown to hold true also for perceptual judgments. In SCM, confidence is modeled by the procedure for assessment of statistical level of confidence: For a 2-alternative, forced-choice item, confidence is based on the consistency with which the choice is favored across a sample of representations of the item, and acts as a monitor of the likelihood that a new sample will yield the same choice. Assuming that these representations are drawn from commonly shared populations of representations associated with each item, predictions regarding the basis of confidence were confirmed by results concerning the functions relating confidence and choice latency to interparticipant consensus and to intraparticipant consistency for majority and minority choices. With regard to the confidence-accuracy (C/A) relationship, the consensuality principle, documented for general-knowledge tasks (Koriat, 2008a), was replicated for perceptual judgments: Confidence correlated with the consensuality of the choice rather than with its correctness, suggesting that the C/A correlation is due to the relationship between confidence and self-consistency and is positive only as long as the correct choices are the consistently made choices. SCM provides a general model for the basis and accuracy of confidence judgments across different domains.     

Thinking groups: Rhetorical enactment of collective identity in three Israeli Kibbutzim

The present paper reports a case study about public deliberations in three Israeli kibbutzim regarding a disputed school issue: whether to maintain a traditional in-kibbutz high school despite a heavy financial burden or to close it and send kibbutz youths to a public regional school The results served as a demonstration of a 'thinking group' (i.e. of how the collective aims of a group are achieved by the coordinated rhetorical behaviour of individuals according to the formal rules of the collective deliberations). First, video-recordings of six general assembly meetings in which the issue was discussed was analyzed as to their argumentative content. Second, the extracted arguments were presented to a sample of 342 kibbutz members to capture the distribution of opinions in the population. It is proposed that most kibbutz members were willing to preserve their collective living and saw the closure of their in-kibbutz school as a threat to their traditional collective identity. We observed a distinct form of public rhetoric during the deliberations in the general meetings which provides a podium for the disputed opinions, preserves the kibbutz shared identity representation and avoids social friction.