نتایج جستجو برای: control groups
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In the blocking paradigm, subjects receive reinforced presentations of a compound, AX, after reinforced presentations of A alone. Following this training, responding to X is often diminished relative to a control group, which did not receive the prior training with A. Standard associative theories of learning such as the Rescorla-Wagner model (Rescorla & Wagner, 1972) explain this effect by ass...
Distress responses of rats like screams are aversive for other rats. This study was conducted to determine some of the conditions affecting these aversive properties. Eighteen rats were trained to press a lever to obtain food on a FR4 schedule, then assigned to Shock-experienced group (SE). Overshadow group (OS), and Control group (CNT). SE received three 1-second shocks (1 mA) a day for two da...
Long-term bed-rest is used to simulate the effect of spaceflight on the human body and test different kinds of countermeasures. The 2nd Berlin BedRest Study (BBR2-2) tested the efficacy of whole-body vibration in addition to high-load resisitance exercise in preventing bone loss during bed-rest. Here we present the protocol of the study and discuss its implementation. Twenty-four male subjects ...
The aim of this study is to investigate the effects of repeated unreinforced exposure to chocolate cues in persons reporting chocolate craving. Participants in the experimental group (n=40) received 10 consecutive brief exposures to chocolate cues in each of two sessions, separated by 1-3 days. Control participants (n=18) received two exposures at the start and end of each session. Chocolate cr...
OBJECTIVES The purpose of this study was to investigate the effect of tomato juice drinking on the antimutagenicity of saliva. METHODS Subjects were 22 healthy male university students. They were divided into tomato group and control group. The tomato group drank tomato juice for 10 days. The anti-mutagenicity of saliva was measured using the umu test. RESULTS In the tomato group, there was...
BACKGROUND There is consensus that the treatment of schizophrenia should combine anti-psychotic medication and psychosocial interventions in order to address complex social, economic and health needs. It is recommended that family therapy or support; community-based rehabilitation; and/or self-help and support groups should be provided for people with schizophrenia in low and middle-income coun...
the research questions were as follows: 1. is there any relationship between the students concious awareness of the form and implications of the conjuncations and their improvement in using appropriate conjunctions? 2. does students knowledge of the from and the implications of the conjunctions help them to produce more coherent writings. 3. does a comparison between english conjunctions and th...
this study investigated (a) the learners’ existing reading strategy repertoire, (b) the effect of instruction in reading strategies on learners’ strategic performance, and (c) the effect of explicit instruction in top-down reading strategies on reading comprehension ability of intermediate learners. the study was conducted with 40 intermediate efl learners in two groups of experimental and cont...
In this study we examined the effect of hypnosis on preoperative anxiety. Subjects were randomized into 3 groups, a hypnosis group (n = 26) who received suggestions of well-being; an attention-control group (n = 26) who received attentive listening and support without any specific hypnotic suggestions and a "standard of care" control group (n = 24). Anxiety was measured pre- and postinterventio...
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