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261.
We investigated the mechanisms responsible for the automatic processing of the numerosities represented by digits in the size congruity effect (Henik & Tzelgov, 1982). The algorithmic model assumes that relational comparisons of digit magnitudes (e.g., larger than {8,2}) create this effect. If so, congruity effects ought to require two digits. Memory-based models assume that associations between individual digits and the attributes "small" and "large" create this effect. If so, congruity effects ought only to require one digit. Contrary to the algorithmic model and consistent with memory-based models, congruity effects were just as large when subjects judged the relative physical sizes of small digits paired with letters as when they judged the relative physical sizes of two digits. This finding suggests that size congruity effects can be produced without comparison algorithms. 相似文献
262.
Reduced response readiness delays stop signal inhibition 总被引:4,自引:0,他引:4
This study examines the effect of response readiness on the stopping of motor responses. Thirteen subjects performed a primary task requiring a speeded choice reaction on go trials and response inhibition on nogo trials. An occasional cue informed subjects that a nogo trial was imminent but left them uncertain about the number of go trials separating the cue and the upcoming nogo trial. This setup was meant to create test episodes of reduced response readiness (i.e., trial sequences initiated by the cue and terminated by the nogo signal) and control episodes, in which subjects were ready to execute a speeded choice reaction (i.e., trial sequences consisting only of go trials). During both episodes, a visual stop signal could occasionally and unpredictably follow go signal onset, instructing subjects to withhold their response to the go signal. Choice reactions on go trials were delayed during test episodes relative to control episodes. Most importantly, stop reactions were delayed, not facilitated, during test episodes compared to control episodes. These findings were taken to suggest that reduced readiness gives rise to more forceful responses that are then more difficult to inhibit. 相似文献
263.
An instance theory of attention and memory 总被引:6,自引:0,他引:6
Logan GD 《Psychological review》2002,109(2):376-400
An instance theory of attention and memory (ITAM) is presented that integrates formal theories of attention and memory phenomena by exploiting commonalities in their formal structure. The core idea in each theory is that performance depends on a choice process that can be modeled as a race between competing alternatives. Attention and categorization are viewed as different perspectives on the same race. Attention selects objects by categorizing them; objects are categorized by attending to them. ITAM incorporates each of its ancestors as a special case, so it inherits their successes. 相似文献
264.
Logan CA 《Journal of the history of the behavioral sciences》2002,38(4):393-403
In the nineteenth century, scientific materials in experimental physiology changed dramatically. In this context, phenomena that had been widely accepted were lost, sometimes to be reintroduced later as "discoveries." I describe the loss of the phenomenon of classical conditioning, later rediscovered by Ivan Pavlov. In 1896, Austrian physiologist Alois Kreidl demonstrated experimentally that animals anticipate the occurrence of food that is cued by a variety of stimuli. Kreidl stated, moreover, that the fact that animals can be called to food had been widely known to science since the 1830s. I describe Kreidl's work and discuss several factors that may have led to the disappearance of conditioning prior to its rediscovery by Pavlov. 相似文献
265.
Backward masking is a popular method of preventing awareness of facial expressions, but concerns have been expressed as to the effectiveness of masking in previous research, which may have resulted in unjustified claims of unconscious processing. We examined the minimum presentation time for discrimination of fearful, angry, happy and neutral faces in a backward masking task using both objective sensitivity measures, based on signal detection analysis, and subjective awareness ratings. Results from two experiments showed for all expressions the mean sensitivity and the sensitivity scores of most individual participants were above chance at presentation times of 20 ms. Awareness ratings for happy, fearful and angry also exceeded baseline ratings from 20 ms onwards. Overall sensitivity in both experiments was greatest for happy expressions, which is an agreement with previous reports. The results support the possibility of incomplete masking in earlier studies that used masking to prevent awareness of facial expressions. 相似文献
266.
Although education in the responsible conduct of research is considered necessary, evidence bearing on the effectiveness of these programs in improving research ethics has indicated that, although some programs are successful, many fail. Accordingly, there is a need for systematic evaluation of ethics education programs. In the present effort, we examine procedures for evaluation of ethics education programs from a multilevel perspective: examining both within-program evaluation and cross-program evaluation. With regard to within-program evaluation, we note requisite designs and measures for conducting systematic program evaluation have been developed and multiple measures should be applied in program evaluation. With regard to cross-program evaluation, we argue that a meta-analytic framework should be employed where analyses are used to identify best practices in ethics education. The implications of this multilevel approach for improving responsible conduct of research educational programs are discussed. 相似文献
267.
This study examined associations between past interpersonal victimization (including both child and adult victimization) and sexual harassment (SH); and it examined intervening and moderating variables of the association of past victimization with SH, including posttraumatic stress symptoms (PTSS) and job-gender context. In addition, we examined an alternative hypothesis for revictimization that abuse survivors are hyper-sensitive to perceptions of sexual harassment. Employed women residing in Kentucky (U.S.) who had received an order of protection from a male partner and who were followed-up 12 months later (n?=?445, 78 % White, mean age?=?31.98, SD?=?8.60) were selected for this analysis. SH experienced between baseline and follow-up interviews was associated with baseline assessments of child nonsexual assault experiences (r?=?0.24, p?<?0.001) and intimate partner violence victimization (r?=?0.20, p?<?0.000), demonstrating a revictimization effect. PTSS mediated the relationship between child sexual assault, child nonsexual assault and subsequent SH. Further, working in a job with a male supervisor or in a male-dominated workgroup increased associations between child nonsexual abuse and subsequent SH. No support was found for the hyper-sensitivity hypothesis. Findings are consistent with prior research that identifies sexual harassment as a form of interpersonal violence that mental health and victim service providers and researchers should include in their assessment and treatment strategies. Employers should also understand that working in male-dominated work environments compound the risk of sexual harassment for those with prior abuse histories and should be vigilant to reducing these risks. 相似文献
268.
An important research need concerns identifying and describing factors that promote reflexivity and change in life-design career interventions. Career construction counseling, a primary life-design intervention, uses narrative methods in an interpersonal process of helping people design a work life through reflexive action. Using Interpersonal Process Recall (IPR), the present study examined what prompts reflexivity and change in career construction counseling. A single case analysis method involving a 24-year old Caucasian woman examined one client's experience of processes that prompted change and reflection about her current career transition. Post-counseling IPR with the client of her videotaped career construction counseling session indicated five major themes: (a) role models prompt identity reflection, (b) early recollections foster cohesion, (c) follow-up questions add depth to the story, (d) counselor as audience provides clarity and validation, and (e) career construction interview questions illuminate perspective and need for action. Results support prior research indicating the usefulness of career construction counseling for promoting reflexive action in life design. 相似文献
269.
Factors affecting perceptions of occupational suitability were examined for speakers who stutter and speakers who do not stutter. In Experiment 1, 58 adults who do not stutter heard one of two audio recordings (less severe stuttering, more severe stuttering) of a speaker who stuttered. Participants rated the speaker's communicative functioning, personal attributes, and suitability for 32 occupations, along with perceptions of the occupations' speaking demands and educational requirements. Perceived speaking demand strongly affected occupational suitability ratings at both levels of stuttering severity. In Experiment 2, 58 additional adults who do not stutter heard a recording of another adult in one of two conditions (fluent speech, pseudo-stuttering), and provided the same ratings as in Experiment 1. In the pseudo-stuttering condition, participants' perceptions of occupational speaking demand again had a strong effect on occupational suitability ratings. In the fluent condition, suitability ratings were affected primarily by perceived educational demand; perceived speaking demand was of secondary importance. Across all participants in Experiment 2, occupational suitability ratings were associated with ratings of the speaker's personal attributes and communicative functioning. In both experiments, speakers who stuttered received lower suitability ratings for high speaking demand occupations than for low speaking demand occupations. Ratings for many high speaking occupations, however, fell just below the midpoint of the occupational suitability scale, suggesting that participants viewed these occupations as less appropriate, but not necessarily inappropriate, for people who stutter. Overall, the findings support the hypothesis that people who stutter may face occupational stereotyping and/or role entrapment in work settings. EDUCATIONAL OBJECTIVES: At the end of this activity the reader will be able to (a) summarize main findings on research related to the work-related experiences of people who stutter, (b) describe factors that affect perceptions of which occupations are best suited for speakers who stutter and speakers who do not stutter, and (c) discuss how findings from the present study relate to previous findings on occupational advice for people who stutter. 相似文献
270.
Yamaguchi M Logan GD Bissett PG 《Journal of experimental psychology. Human perception and performance》2012,38(1):123-134
Although dual-task interference is ubiquitous in a variety of task domains, stop-signal studies suggest that response inhibition is not subject to such interference. Nevertheless, no study has directly examined stop-signal performance in a dual-task setting. In two experiments, stop-signal performance was examined in a psychological refractory period task, in which subjects inhibited one response while still executing the other. The results showed little evidence for the refractory effect in stop-signal reaction time, and stop-signal reaction time was similar in dual-task and single-task conditions, despite the fact that overt reaction times were significantly affected by dual-task interference. Therefore, the present study supports the claim that response inhibition does not suffer dual-task interference. 相似文献