Response probabilities and “same-different” reaction times

A “same-different” reaction-time (RT) task with multidimensional stimuli was used with a 50:50 and a 75:25 proportion of “different” to “same” response. The “different” RTs to each dimension were similar for the two proportions. However, the “same” RT in the 50:50 condition was faster than the “same” for the 75:25 condition and faster than the slowest “different” RT. Interpretations of the results in terms of response bias and processing criteria are offered.     

Developmental and cognitive perspectives on humans’ sense of the times of past and future events

Mental time travel in human adults includes a sense of when past events occurred and future events are expected to occur. Studies with adults and children reveal that a number of distinct psychological processes contribute to a temporally differentiated sense of the past and future. Adults possess representations of multiple time patterns, and these representations take several different forms. Memory for the times of past events is built upon reconstruction of temporal locations, impressions of distances in the past, and order-codes. The times of future events are understood primarily as locations in represented time patterns, but propositions active in memory contain information that particular events are coming soon. Young children have difficulty distinguishing the past–future status of some events, showing that basic memory processes do not make the distinction clear. Concepts of the past and future may be required for differentiating these two categories of experience.     

Does the order of head noun and modifier explain response times in conceptual combination?

We describe a speeded sensibility judgment experiment in which noun-noun combinations in the Indonesian language were used that parallels Gagné and Shoben's (1997) study of combinations in the English language. Like English, Indonesian is read from left to right and contains noun-noun combinations that are formed by juxtaposing the nouns. However, unlike in English, the order of the modifier and the head noun is reversed. This difference between English and Indonesian combinations allowed us to assess whether sensibility judgments of combinations are affected primarily by the left-right order of the nouns or by different functional roles of the nouns (i.e., modifier vs. head noun). As in Gagné and Shoben's study, the modifier's relation frequency contributed significantly to predicting sensibility judgment times in a regression analysis, but the head noun's relation frequency did not. We discuss the implications of this finding for models of conceptual combination.     

On the origin and development of the idea of “de” in Pre-Qin times

In ancient Chinese thoughts, de is a comparatively complicated idea. Most of the researchers translated it directly into “virtue”, but this translation is not accurate for our understanding of the idea of “de” in pre-Qin times. Generally speaking, in Pre-Qin times, the idea of “de” underwent three developmental periods. The first is the de of Heaven, the de of ancestors; the second the de of system; and the third the de of spirit and moral conducts. In a long period of history, the idea of “de” never cast off the influence of tian Dao (the way of Heaven). It was in Western Zhou Dynasty that the idea of “de” shook off the dense fog of the mandate of Heaven. However, it was the thinkers in Spring and Autumn Period and Warring States who made contributions to bring it deep into people’s mind. The ancient Chinese thoughts were mainly concerned with people’s recognition and development of their own abilities, with people’s seeking harmony and balance between human-beings and nature, and with people’s seeking harmonious and balanced human relations. The development of the idea of “de” played a very important role in this context. __________ Translated from Zhongguo Shehui Kexue 中国社会科学 (China Social Sciences), 2005(4) by Lei Yongqiang     

Dynamic perceptual completion and the dynamic snapshot view to help solve the ‘two times’ problem

Perceptual completion fills the gap for discrete perception to become continuous. Similarly, dynamic perceptual completion (DPC) provides an experience of dynamic continuity. Our recent discovery of the ‘happening’ (H) element of DPC completes the total experience for dynamism in the flow of time (FOT). However, a phenomenological explanation for these experiences is essential. The Snapshot Hypotheses especially the Dynamic Snapshot View provides the most comprehensive explanation. From that understanding the ‘two times’ problem (TTP) can be addressed. The static time of spacetime cosmologies has been irreconcilable with the dynamic FOT. Dismissing the FOT as an illusion is unsatisfactory. Therefore, we provide four hypotheses for the TTP.

1) Since cosmological static time demands that all events (cerebral included) are discrete, DPC elements for dynamism should likewise be expected to be discrete and accounted for by a snapshot phenomenology such as the DSV. 2) If temporality can be demonstrated to be similar to apparent motion by being a snapshot phenomenon and not demanding temporal extension it would confirm the DSV and permit reconciliation with static time. 3) If the ‘present moment’ (of the FOT) is subjective as static time theories suggest, it should be possible experimentally for an observer to choose his own ‘present’ by moving (perceptually) to various points in the past with the aid of virtual reality. 4) If dynamism e.g. motion can be precluded without significant information loss or violating physics principles it is a cognitive add-on, thereby contradicting non-static time theories which suggest that time is ‘real.’ We confirm those hypotheses.

     

Predicting performance times from deliberate practice hours for triathletes and swimmers: what, when, and where is practice important?

In Studies 1 and 2, the authors evaluated deliberate practice theory through analyses of the relationship between practice and performance for 2 populations of athletes: triathletes and swimmers, respectively. In Study 3, the authors obtained evaluations of practice from athletes' diaries. Across athletes, length of time involved in fitness activities was not related to performance. For the triathletes, a significant percentage of variance in performance was captured by practice. This was not so for sprint events for the swimmers, in which gender was a significant predictor. In the diaries, physical activities were perceived as enjoyable. In contrast to the results obtained from questionnaires, enjoyment did not covary with an activity's relevance to improving performance. Although these findings highlight the importance of sport-specific practice, the authors question a domain-independent account of expertise based on deliberate practice.     

Reaction times and error rates for “same”-“different” judgments of multidimensional stimull

Each S indicated whether two successively presented rows of letters were “same” or “different.” Reaction times of the “different” response seemed to indicate that S examined the stimulus letters in a serial, self-terminating manner. However, the reaction times of the “same” response were not consistent with this model. Consequently, it was proposed that S employs simultaneously two distinct processes for comparing stimuli. One process would generate the “different” responses; the other process would generate the “same” responses. Most false “same” responses occurred when the two rows of letters differed minimally. Thus, the false “same” responses appear to result from a failure to detect the difference between the two stimuli. However, when S made a false “same” response, he was aware that he had done so. Therefore, it was suggested that only one of the two comparison processes failed to detect the stimulus difference.     

Determinants of central processing order in psychological refractory period paradigms: central arrival times, detection times, or preparation?

Three psychological refractory period (PRP) experiments were conducted to assess the effect of central arrival times at the bottleneck on task order scheduling. In Experiment 1, a visual first task (plus-minus symbol discrimination) was combined with an auditory second task (left-right tone judgement) in a standard PRP paradigm with constant task order. In Experiment 2, the order of the tasks varied unpredictably. In Experiment 3, visual-auditory dual-task trials were randomly mixed with single-task trials. To dissociate central arrival times from stimulus detection times, the perceptual stage of the visual task was extended using stimulus degradation. Most importantly, no evidence for a first-come, first-served principle at the central bottleneck was found with the employed paradigms. Instead, the results indicated that preparation (Experiment 1) and the detection times of the stimuli (Experiments 2 and 3) were the main determinants of central processing order in the present study. In the light of previous research, the results indicate that central processing order can be influenced by various factors. The interplay between these factors seems to depend highly on the conditions and requirements of the employed experimental paradigm.     

Does stimulant medication decrease the lower extremity response times of children with and without attention-deficit/hyperactivity disorder?

In 2005 Pedersen and Surburg reported that stimulant medications reduced the lower extremity response times of 16 boys with Attention-Deficit/Hyperactivity Disorder. However, as boys without ADHD and girls with and without ADHD were not studied, one cannot conclude that reported effects represent a medication effect unique to children with ADHD. An alternative hypothesis is presented: that stimulant medications produce an excitatory effect in the central nervous system by increased occupancy of postsynaptic dopamine receptors to reduce the lower extremity response times of children in general. Well-designed controlled clinical trials are needed to evaluate this hypothesis.     

Are attentional dwell times inconsistent with serial visual search?

Duncan, Ward, and Shapiro (1994) estimated that attention must remain focused on an object for several hundred milliseconds before being shifted to another object, and they referred to this period as theattentional dwell time. An important implication of these long estimates of the dwell time for models of visual search is that the search process must not involve an item-by-item serial scanning mechanism. If it did, then searching through an array of items would require enormous amounts of time, which—based on data from visual search experiments—it does not. The present report, however, provides evidence that the long estimates of attentional dwell time were caused, at least in part, by the use of masked targets. Implications of these variable estimates of the attentional dwell time for models of visual search are discussed.     

Are the times changing? An analysis of sex-role prejudice

Sex bias was studied through evaluation of articles, in a technique modeled upon Goldberg's. Goldberg (1968) indicated that college women evaluated an article more positively when it was ascribed to a male rather than to a female author. The primary purpose of the present research was to examine a diverse sample, including subjects of both sexes and varying ages, and to determine whether sex-role attitudes have changed over time. Therefore, 64 students at the University of California, Santa Cruz, 64 students from San Jose State University, and 96 nonstudents from the San Francisco—Monterey Bay areas each evaluated six articles on several dimensions. Packets were counterbalanced for ascribed sex of author and sex of topic (male, female, or neutral). An analysis of variance yielded significant main effects for sex of subject and sex of topic. Further analyses yielded complex interactions which appeared to be primarily due to the responses of young nonstudents. The absence of an overall sex of author effect and the general pattern of data are interpreted in terms of the generalizability of research findings.Some of the results reported in this paper were presented in a symposium on sex-role research methodology at the annual meeting of the Western Psychological Association, Los Angeles, April 1976.     

Utilizing response times in cognitive diagnostic computerized adaptive testing under the higher-order deterministic input,noisy ‘and’ gate model

Methods of cognitive diagnostic computerized adaptive testing (CD-CAT) under higher-order cognitive diagnosis models have been developed to simultaneously provide estimates of the attribute mastery statuses of examinees for formative assessment and estimates of a latent continuous trait for overall summative evaluation. In a typical CD-CAT environment, examinees are often subject to a time limit, and the examinees’ response times (RTs) for specific test items can be routinely recorded by custom-made programs. Because examinees are individually administered tailored sets of test items from the item pool, they may experience different levels of speededness during testing and different levels of risk of running out of time. In this study, RTs were considered during the item-selection procedure to control the test speededness and the RTs were treated as useful information for improving latent trait estimation in CD-CAT under the higher-order deterministic input, noisy ‘and’ gate (DINA) model. A modified posterior-weighted Kullback–Leibler (PWKL) method that maximizes the item information per time unit and a shadow-test method that assembles a provisional test subject to a specified time constraint were developed. Two simulation studies were conducted to assess the effects of the proposed methods on the quality of CD-CAT for fixed- and variable-length exams. The results show that, compared with the traditional PWKL method, the proposed methods preserve a lower risk of running out of time while ensuring satisfactory attribute estimation and providing more accurate estimates of the latent trait and speed parameters. Finally, several suggestions for future research are proposed.     

Subjective reports of stimulus,response, and decision times in speeded tasks: How accurate are decision time reports?

Four experiments examined how accurately participants can report the times of their own decisions. Within an auditory reaction time (RT) task, participants reported the time at which (a) the tone was presented, (b) they decided on the response, or (c) the response key was pressed. Decision time reports were checked for plausibility against the actual RTs, and we compared the effects of experimental manipulations on these two measures to see whether the reported decision times showed appropriate effects. In addition, we estimated the amount of error associated with individual decision time reports by checking how often participants’ decision time reports were implausibly early (i.e., before stimulus onset) or late (i.e., after response), and by using several quantitative models. Overall, the results suggest that decision time reports are not very accurate but they may be usable for some purposes.     

Has the cataphasic form of schizophrenia increased in modern times?

According to our investigations the incidence of cataphasia, which is a subtype of schizophrenia, has become more common in the last years and on average, has started earlier in life. As the central disorder of this illness concerns thinking perhaps there exists a relation of our finding to the rapid modern development of techniques, insofar as the cognitive function is overstrained in childhood and adolescence, when the nervous system has not matured yet. Introverted individuals seem to be at a particular risk. However, it must not be disregarded that cataphasia is an inherited illness which cannot be caused by external influences, but can only be promoted in its manifestation.     

Finishing on time: When do predictions influence completion times?

People typically predict they will finish projects earlier than they do. Whereas previous research has examined the determinants of this prediction bias, the present research explored potential consequences for behavior. In particular, we examined whether and when task completion predictions influence actual completion times. In four experiments we used anchoring manipulations to induce participants to make relatively early or late task completion predictions, and then examined when they started and/or finished the target tasks. As hypothesized, the prediction manipulation influenced completion times under certain conditions defined by the nature of the target task. Manipulated predictions affected completion times of closed tasks, defined as tasks carried out within a single, continuous session but not of open tasks, defined as tasks requiring multiple work sessions. This implies that task completion predictions help to initiate action, but their impact diminishes over the course of extensive, multi-stage projects.