Elementary Experiments in Psychology

By Carl E. Seashore | Go to book overview

CHAPTER III
THE VISUAL FIELD

For One.

THE problem is to measure the field of vision for white and colors, and to determine some characteristic color-changes in the indirect field.

Make the following preparation for the experiment: Lay a piece of cardboard back of Fig. 1. Prick through the page with a pin at each number on the arc, at the free end of the heavy line, and at the principal points in the light line. Trim the card by cutting according to the tracing of the light line. Insert the degree-numbers at the appropriate points. Draw the heavy line. Punch a pinhole at the free end of the heavy line, .which is the center of the arc. Put a thread through the hole and tie a knot at the back of the card. Tie a knot at the other end of the thread, fifty centimeters away. Take the large black square and the small white, red, green, yellow, and blue squares from the book envelope. Lay the white square upon the large black square as a background; then stick a pin through the knot at the free end of the cord, through the two squares near a corner of the small one, and finally through a cork

-23-

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Elementary Experiments in Psychology
Table of contents

Table of contents

  • Title Page i
  • Preface iii
  • Contents vii
  • Introduction ix
  • Chapter I- Visual After-Images 1
  • Chapter II- Visual Contrast 13
  • Chapter III- The Visual Field 23
  • Chapter IV- Visual Space 39
  • Chapter V- Auditory Space 55
  • Chapter VI- Tactual Space 71
  • Chapter VII- Cutaneous Sensations 82
  • Chapter VIII- Weber''s Law 91
  • Chapter IX- Mental Images 104
  • Chapter X- Association 118
  • Chapter XI- Memory 131
  • Chapter XII- Apperception 144
  • Chapter XIII- Attention 158
  • Chapter XIV- Normal Illusions 172
  • Chapter XV- Affective Tone 191
  • Chapter XVI- Reation-Time 205
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