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  • Psychology  (3)
  • PN 320  (3)
  • 1
    Online Resource
    Online Resource
    Hogrefe Publishing Group ; 2016
    In:  European Psychologist Vol. 21, No. 2 ( 2016-04), p. 122-130
    In: European Psychologist, Hogrefe Publishing Group, Vol. 21, No. 2 ( 2016-04), p. 122-130
    Abstract: Abstract. The placebo effect involves a complex network of psychological variables that are often disregarded by studies enquiring into this effect. It is hence little surprising that these psychological variables confound study outcomes and that experiments investigating the placebo effect often yield radically different results. The current article identifies three categories of psychological and methodological factors that are not systematically considered in placebo research: psychological confounds (Hawthorne effects and demand effects); methodological and data-analysis issues; and clinicians’ expectancy effects. These factors are not necessarily to be seen as mere artifacts, however, because they may constitute favorable components of the placebo effect. A set of benchmark criteria is therefore proposed to allow researchers to capitalize on these components during placebo research rather than have their results confounded by them; and to allow for a more reliable interpretation of study outcomes.
    Type of Medium: Online Resource
    ISSN: 1016-9040 , 1878-531X
    RVK:
    RVK:
    Language: English
    Publisher: Hogrefe Publishing Group
    Publication Date: 2016
    detail.hit.zdb_id: 1238521-9
    detail.hit.zdb_id: 2090869-6
    SSG: 5,2
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Online Resource
    Online Resource
    Hogrefe Publishing Group ; 1996
    In:  European Psychologist Vol. 1, No. 2 ( 1996-01), p. 113-122
    In: European Psychologist, Hogrefe Publishing Group, Vol. 1, No. 2 ( 1996-01), p. 113-122
    Abstract: The main objective of the present study was to characterize sex differences in the temporal discrimination and activity level of an animal model of attention deficit disorder (ADD) using a conjunctive 120-s variable interval 16-s differential reinforcement of low rate (VIDRL) schedule of reinforcement. The results showed that the spontaneously hypertensive (SHR) male was generally hyperactive and that the SHR female was both hyperactive and had severe time discrimination problems. The latter caused relatively fewer reinforcers to be delivered. However, even when a reinforcer was delivered, the SHR female frequently failed to collect it. When the SHR females were in diestrus, their behavior became even less efficient. The present findings with the animal model seem to be in general agreement with the behavior of ADD children when a DRL schedule is used. Most of our results were explained as due to impulsiveness, which is more pronounced in the SHR female than in the male. In addition, the SHR female had attention problems. The present study further supports the usefulness of the SHR as animal model of ADD.
    Type of Medium: Online Resource
    ISSN: 1016-9040 , 1878-531X
    RVK:
    RVK:
    Language: English
    Publisher: Hogrefe Publishing Group
    Publication Date: 1996
    detail.hit.zdb_id: 1238521-9
    detail.hit.zdb_id: 2090869-6
    SSG: 5,2
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    In: European Psychologist, Hogrefe Publishing Group, Vol. 5, No. 4 ( 2000-12), p. 312-325
    Abstract: Psychopharmacological interventions for managing aggression in schizophrenia have thus far yielded inconsistent results. This study evaluates the antiaggressive efficacy of combined haloperidol-propranolol treatment. Thirty-four newly admitted schizophrenic patients were studied in a controlled double-blind trial. Following a 3-day drug-free period and 7 days of haloperidol treatment, patients were randomly assigned to receive either haloperidol-propranolol or haloperidol-placebo for eight consecutive weeks. Doses of medications were adjusted as necessary; biperiden was administered if required. Rating scales were applied to assess aggression, anger, psychosis, depression, anxiety and extrapyramidal symptoms. The mean daily dose of haloperidol was 21 mg (SD = 6.4) in the research group and 29 mg (SD = 6.9) in the controls. Mean and maximal daily doses of propranolol were 159 mg (SD = 61) and 192 mg (SD = 83), and of placebo, 145 mg (SD = 50) and 180 mg (SD = 70), respectively. Compared with the controls, the scores for the research patients decreased significantly from baseline, particularly after 4 weeks of treatment, for some dimensions of anger, psychosis, anxiety, and neuroleptic-induced parkinsonism. A tendency for reduced aggression was shown in the combined haloperidol-propranolol group for some dimensions but not others. These patients also required significantly less biperiden. The tendency toward elevated antiaggressive effect of combined haloperidol-propranolol treatment compared to haloperidol alone may be explained by a simultaneous decrease in aggression, psychotic symptomatology, and anxiety.
    Type of Medium: Online Resource
    ISSN: 1016-9040 , 1878-531X
    RVK:
    RVK:
    Language: English
    Publisher: Hogrefe Publishing Group
    Publication Date: 2000
    detail.hit.zdb_id: 1238521-9
    detail.hit.zdb_id: 2090869-6
    SSG: 5,2
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
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