摘要:

Reactions to a placebo introduced either as a depressant or as a stimulant drug were examined in 16 healthy female subjects. Comparisons between pre‐ and post‐placebo measurements showed that the two treatments produced marked effects in opposite directions: (1) the ‘depressant’ placebo produced a statistically significant decrease in pulse rate, blood pressure, objective and subjective reaction speed, as well as significant effects on subjective mood in the expected directions, and (2) the ‘stimulant’ placebo produced opposite and significant changes in all variables. The subjective reactions were, on the whole, more pronounced than the effects on performance and physiologica

ISSN:0036-5564    

DOI:10.1111/j.1467-9450.1963.tb01330.x

出版商:Blackwell Publishing Ltd    

年代:1963

数据来源: WILEY

摘要:

The effects of empirical control vs. no empirical control, and of fixed vs. free procedure on the acquisition of transitivity of weight was studied. The fixed procedure involved practice on the sequence A>B, B>C, A>C, whereas the free procedure merely required the children to order triads of objects according to weight. Around thirty per cent of the subjects acquired transitivity, but none of the experimental variables had any effect. It is concluded that empirical control is unimportant. The lack of effect of free vs. fixed procedure is contrary to some earlier findings with younger children, who profited only from a free procedure.

ISSN:0036-5564    

DOI:10.1111/j.1467-9450.1963.tb01331.x

出版商:Blackwell Publishing Ltd    

年代:1963

数据来源: WILEY

摘要:

The effects of five procedures on the acquisition of conservation of length were studied. A Müller‐Lyer illusion was used to induce apparent changes in length in the test‐ and practice‐situations. Two procedures involved practice on addition‐subtraction, one a progressive increase in the strength of the Müller‐Lyer illusion, and one the anticipation of the outcome of displacements of the objects. A fifth procedure was a composite of the other four. The results showed some acquisitions in all groups, with highest frequency in the anticipation group, and lowest in the increase‐in

ISSN:0036-5564    

DOI:10.1111/j.1467-9450.1963.tb01332.x

出版商:Blackwell Publishing Ltd    

年代:1963

数据来源: WILEY

摘要:

By a reasoning similar to Fechner's a general psychophysical differential equation is developed. Its integration allows the calculation of intrasubjective relations, provided the Weber functions of the two pertinent variables are known. The method is empirically validated for the relation between category and magnitude scales and for the similarity function. Theoretical implications are discussed.

ISSN:0036-5564    

DOI:10.1111/j.1467-9450.1963.tb01333.x

出版商:Blackwell Publishing Ltd    

年代:1963

数据来源: WILEY