A First Laboratory Guide In Psychology Author:Mary. Collins A FIRST LABORATORY GUIDE IN PSYCHOLOGY BY MARY COLLINS, M. A., B. Eo., PH. D. LECTURER ON APPLIED PSYCHOLOGY, UNIVERSITY OF EDINBURGH JAMES DREVER, M. A., B. Sc., D. PHIL. DIRECTOR OF THE OEOROB COMBS PSYCHOLOGICAL LABORATORY, UNIVERSITY OF EDINBURGH WITH A FRONTISPIECE AND 12 DIAGRAMS THIRD EDITION, REVISED METHUEN CO. LTD. LONDON 36 Essex Stre... more »et W. C. 2 PREFATORY NOTE THE purpose of this volume, which is supple mentary to An Introduction to Experimental Psychology by the same authors, is to supply a laboratory guide which may be put in the hands of first-year students of Psychology. It is possibly a counsel of perfection to recommend that, in this as in other sciences, practical work should accompany theoretical lectures from the very beginning. It is at least certain that no first-years course without practical work can be regarded as satisfactory. The selection of the experiments included is based on the work actually done in the first-years course in the George Combe Psychological Laboratory. It is not intended that all the students should perform all the fifty experiments. Twenty experiments would appear to be as much as one can reasonably expect even the best students to carry out in an experi mental course of not more than sixty hours, which may be taken as the normal period that can be devoted to experimental work during a first year in Psychology. The additional experiments described, therefore, will afford opportunity and scope for arranging a course suitable to the needs of the students and to the resources of the laboratory. vi LABORATORY GUIDE IN PSYCHOLOGY The experiments are described in sufficient detail as regards apparatus, procedure, etc., to obviate the necessity of having the instructors time at the beginning of each experimental session occupied in giving directions to the students with respect to the conduct of the experiment. All he need do is to tell the students to carry out Experiment No. . In this way also it will be found possible to deal with larger experimental sections, since it is no longer essential that all the students should be doing the same experiment. The authors desire to place on record their in debtedness to the late Mr. L. Inglis Collins for the drawings for the figures in the text, M. C. j. D. EDINBURGH September, igz6 PREFATORY NOTE TO THIRD EDITION IN the present edition a number of new experiments will be found, the total number having been increased from fifty to sixty-six. In addition, as a result of the experience of the authors in using the book with first-year students, fuller directions have been given in certain experiments. M. C. J. D. EDINBURGH, August, 1946. TABLE OF CONTENTS PREFATORY NOTES GENERAL DIRECTIONS . PRELIMINARY EXPERIMENTS PAGE v Experiment Experiment Experiment Experiment Experiment Experiment Experiment Experiment Experiment Experiment 10. Experiment n. Free Association . . . . 3 Constrained Association ... 6 Imagery. Word List Method . . 7 Receptive Imagery ... 9 Estimation of Extent of Movement . 1 1 Statistical Treatment of Data . - 13 The Relation of Speed and Accuracy . 17 Method of Mean Error . . . 19 The Metre Rod . . . .22 Absolute Localization of Point on Skin 25 The Spatial Threshold. Method of Limits ..... 27 Method of Serial Groups . . 30 Method of Right and Wrong Cases . 31 SYSTEMATIC EXPERIMENTS Experiment 14. The Retinal Field for Colour . . 34 Experiment 15. The Mapping of the Blind Spot , 36 Colour Mixing . . . - 39 Colour Acuity . . . .40 Colour Contrast . . . .42 Colour Blindness . . . - 45 Colour Vision Stereoscope . . 47 Pitch Discrimination ... 50 Pitch Discrimination Group Experi ment . . . . - 53 Auditory Acuity . . . - 55 Upper and Lower Limits of Tone . 56 Cold Spots. Also Heat Spots, Touch Spots and Pain Spots . . 57 Localization of Sounds ... 60 Fluctuations of Attention . . 62 Division of Attention ... 64 The Influence of Set or Attitude . 66 Span of Apprehension . . .69 Reproduction of Time Intervals . 71 Experiment 12...« less