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31.
D. N. Elliott L. Frazier W. Riach 《Journal of the experimental analysis of behavior》1962,5(3):323-328
A tracking procedure was used to investigate the time required to train cats to discriminate between a frequency-modulated tone and a steady tone. The animal was reinforced with food on a VR schedule only when the steady tone was present and the animal pressed the correct bar (one of two). After reinforcement, the steady tone usually changed to a frequency-modulated signal; by pressing the other bar, the tone could be changed to its steady state and the reinforcement then obtained as before. A major difficulty was the lack of control by the auditory stimulus on the cat's responses. This problem was solved by introducing interpress time outs which forced the animal to hesitate after every press. The use of light cues to signal the time outs and the correct bar to press accelerated the rate at which the training progressed.
With cats, this conditioning procedure apparently requires a much longer training period before the actual threshold determinations than the more commonly used avoidance conditioning procedures. However, when animals are to be tested repeatedly over a period of several months or longer, the procedure may prove the more desirable one because it reduces experimental neurosis.
相似文献32.
33.
Rizzo A Parsons TD Lange B Kenny P Buckwalter JG Rothbaum B Difede J Frazier J Newman B Williams J Reger G 《Journal of clinical psychology in medical settings》2011,18(2):176-187
Numerous reports indicate that the incidence of posttraumatic stress disorder (PTSD) in returning OEF/OIF military personnel is creating a significant healthcare challenge. These findings have served to motivate research on how to better develop and disseminate evidence-based treatments for PTSD. Virtual Reality delivered exposure therapy for PTSD has been previously used with reports of positive outcomes. This article details how virtual reality applications are being designed and implemented across various points in the military deployment cycle to prevent, identify and treat combat-related PTSD in OIF/OEF Service Members and Veterans. The summarized projects in these areas have been developed at the University of Southern California Institute for Creative Technologies, a U.S. Army University Affiliated Research Center, and this paper will detail efforts to use virtual reality to deliver exposure therapy, assess PTSD and cognitive function and provide stress resilience training prior to deployment. 相似文献
34.
Vaughn E. Stimbert James R. Frazier Harold R. Keller F. J. King 《Journal of School Psychology》1968,6(4):246-249
The effect of three reinforcement conditions was determined with respect to the learning and retention of a commercially available program purporting to teach simple nouns. The addition of candy reward to a novel method of presenting knowledge of results produced no change in performance when given on a continuous schedule, but reduced rate of responding when given on a partial schedule, i.e., only terninal frames. 相似文献
35.
The more covert, subtle violations of sexual abuse are considered, especially the projection of shame (projective identification) routinely committed by perpetrators. James Nelson's concepts of spiritual dualism and sexist dualism are used to understand the deeper dynamics of such shaming and their societal roots. The pastoral counseling relationship can help heal the shame of those who have been abused. 相似文献
36.
The 160-item short form of the Personality Assessment Inventory (PAI) was developed for situations in which respondents complete only the 1st half of the test. The present study evaluates the adequacy and comparability of the full and short forms of the PAI in terms of a wide range of psychometric characteristics. In all, 421 participants completed the full form as part of a neuropsychological evaluation. Results indicated slightly lower internal consistency reliability of the short compared with the full form. Group-level agreement of short and full form scales ranged from adequate to excellent. However, within-subject agreement was somewhat more variable. Low levels of within-subject agreement were strongly associated with elevated validity scale scores. The factor structures of the full and short forms showed high congruence for a 3-factor solution. These findings suggest that many scales of the short form have adequate comparability with their respective full form scales. However, low levels of reliability across less impaired ranges of the latent trait, diminished content coverage, and altered validity detection may limit the utility of some of the short form scales. 相似文献
37.
38.
Norbury CF 《Journal of experimental child psychology》2005,90(2):142-171
Lexical ambiguity resolution was investigated in 9- to 17-year-olds with language impairment (LI, n=20), autistic spectrum disorder (ASD) plus language impairment (ALI, n=28), ASD and verbal abilities within the normal range (ASO, n=20), and typically developing children (TD, n=28). Experiment 1 investigated knowledge of dominant and subordinate meanings of ambiguous words. The LI and ALI groups knew fewer subordinate meanings than did the ASO and TD groups. Experiment 2 used a modified version of the paradigm to investigate contextual facilitation and suppression of irrelevant meanings. All groups demonstrated contextual facilitation, responding quickly and more accurately to words following a biased context. However, children with ALI and LI did not use context as efficiently as did their peers without language deficit. Furthermore, for the LI and ALI groups, errors in the suppression condition reflected poor contextual processing. These findings challenge the assumptions of weak central coherence theory and demonstrate the need for stringent language controls in the study of autistic cognition. 相似文献
39.
It has been noted for some time that given information tends to be placed before new information (e.g., Clark & Clark, 1977). To determine whether this holds generally, double-object and NP-PP sentences like the following were tested in two speeded acceptability judgment experiments. (1A) The senator mailed the woman a report. (1B) The senator mailed a woman the report. (1C) The senator mailed the report to a woman. (1D) The senator mailed a report to the woman. Given-before-new (or definite before indefinite) ordering facilitated processing for double-object structures, with (1A) processed faster and accepted more often than (1B), but did not facilitate processing of (1C) relative to (1D) in NP-PP structures. A third self-paced reading experiment showed that the advantage of the definite-before-indefinite new ordering holds for constructions with a shifted NP (The senator mailed to the woman a report) but also showed that facilitation from having a definite NP immediately after the verb was limited to cases where the two arguments of a verb contrast in definiteness. The results suggest that the presumed given-before-new preference is not general, but is instead limited to certain constructions and is based on the language comprehension system being sensitive to the requirements of language production. 相似文献
40.
In earlier work, Frazier and Rayner (1990) provided evidence for a processing principle termed the Minimal Semantic Commitment (MSC)hypothesis. In the present study, we used the MSC hypothesis as a starting point in addressing the issue of when to treat mental representations as vague versus determinate and ambiguous. Given ambiguous representations, the MSC hypothesis predicts that the processor will commit to one interpretation (the grammatical ambiguity hypothesis). On the other hand, given a single underspecified representation, the MSC hypothesis predicts that the processor will await disambiguating information before fully committing to an interpretation (the vagueness hypothesis). In an experiment designed to evaluate these hypotheses with respect to the representation of distributivity, participants' eye movements were recorded as they read sentences containing distributive or collective predicates that were either disambiguated by a preceding adverb or left locally ambiguous by delaying the disambiguating adverb until the end of the predicate. The results suggested that a semantic commitment is made in locally indeterminate cases as evidenced by a significant interaction of ambiguity and distributivity in first pass times, total times, and regressions. If the difficulty of distributives simply reflected the difficulty of postulating a distributive operator when evidence warranting it is encountered, then no interaction would be expected. Hence we argue that the distributive/collective distinction is treated as a matter of ambiguity rather than as one of vagueness. In the absence of evidence for a distributive reading, the processor commits itself to a collective reading sometime during the processing of the predicate (before the disambiguation in our late disambiguation examples). The findings are discussed in relation to recent linguistic work on the representation of distributivity. 相似文献