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991.
Virginia M. Richards Laurie M. Heller David M. Green 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》1991,43(3):481-501
In an effort to determine whether cues related to changes in energy contribute to the detection of a tone added to a narrow band of noise, we examined the effect of level variation on detection thresholds. In the first experiment, the level of each waveform was randomly varied on each presentation. Level variation had only marginal effects on performance. In addition, detection thresholds were obtained using bands of noise with equal energy across intervals. Neither increasing nor decreasing the variance of the noise-alone and tone-plus-noise energy difference distributions altered the detectability of a tone added to noise. Thus, the changes in energy that are concomitant with the addition of the tone are not the sole cue for the detection of the tone. In a second experiment, three psychometric functions were measured. One function was determined using no level variation, one was measured in the presence of level variation, and one was measured in the context of level variation, but for trials without level variation. The context of level variation slightly reduced detectability. In a third experiment, we compared detectability in three conditions: no level variation, across-trial level variation, and across-interval level variation. The thresholds obtained in the absence of level variation were superior to those measured in the presence of level variation, regardless of the manner in which the level variation was incorporated. 相似文献
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Debra L Franko Laurie B Mintz Mona Villapiano Traci Craig Green Dana Mainelli Lesley Folensbee Stephen F Butler M Meghan Davidson Emily Hamilton Debbie Little Maureen Kearns Simon H Budman 《Health psychology》2005,24(6):567-578
Food, Mood, and Attitude (FMA) is a CD-ROM prevention program developed to decrease risk for eating disorders in college women. Female 1st-year students (N = 240) were randomly assigned to the intervention (FMA) or control group. Equal numbers of students at risk and of low risk for developing an eating disorder were assigned to each condition. Participants in the FMA condition improved on all measures relative to controls. Significant 3-way interactions (Time x Condition x Risk Status) were found on measures of internalization of sociocultural attitudes about thinness, shape concerns, and weight concerns, indicating that at-risk participants in the intervention group improved to a greater extent than did low-risk participants. At follow-up, significantly fewer women in the FMA group reported overeating and excessive exercise relative to controls. 相似文献
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Philosophia - This paper focuses on the interaction of reasons and argues that reasons for an action may transmit to the necessary means of that action. Analyzing exactly how this phenomenon may be... 相似文献
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Evaluating the Interpersonal Needs Questionnaire: Comparison of the Reliability,Factor Structure,and Predictive Validity across Five Versions
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Ryan M. Hill BA Yasmin Rey PhD Carla E. Marin PhD Carla Sharp PhD Kelly L. Green PhD Jeremy W. Pettit PhD 《Suicide & life-threatening behavior》2015,45(3):302-314
Five versions of the Interpersonal Needs Questionnaire (INQ), a self‐report measure of perceived burdensomeness and thwarted belongingness, have been used in recent studies (including 10‐, 12‐, 15‐, 18‐, and 25‐items). Findings regarding the associations between perceived burdensomeness, thwarted belongingness, and suicidal ideation using different versions have been mixed, potentially due to differences in measurement scales. This study evaluated factor structure, internal consistency, and concurrent predictive validity of these five versions in three samples. Samples 1 and 2 were comprised of 449 and 218 undergraduates, respectively; Sample 3 included 114 adolescent psychiatric inpatients. All versions demonstrated acceptable internal consistency. The 10‐item version and 15‐item version demonstrated the best, most consistent model fit in confirmatory factor analyses. Both perceived burdensomeness and thwarted belongingness consistently predicted concurrent suicidal ideation on the 10‐item INQ only. Future research should consider using the 15‐item or 10‐item versions. 相似文献