Bauhaus-Universität Weimar

Titel:
Experimental Psychology: A Manual of Laboratory Practice, Vol. I: Qualitative Experiments, part 2: Instructor's Manual
Person:
Titchener, Edward B.
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit11938/57/
§ io. Canipimctry 
23 
(4) Upper Vertical Meridian. (Upper retina.) 
Outgoing: sensed black at 10 cm. (33° 31') Sensed black at 10 cm. (330 31') 
Incoming: “ red “ 8 “ (270 53') “ green“ 9 “ (3°° 4«') 
(5) Lower Vertical Meridian. (Lower retina.) 
Outgoing: sensed black at 7 cm. (240 51') Sensed black at 8 cm. (27° 53') 
Incoming: “ red “ 7 “ (24°5i') “ green“ 7 “ (24° 51') 
An experiment made upon the same O, under similar condi¬ 
tions, with blue and yellow, gave the following results. 
(1) Date: 24/5/99. 9 A.M. Dull sky. 
Blue 360° = Yellow 6o° + Black 300°. 
(2) Right Horizontal Meridian. (Temporal retina.) Eye-rest 14.3 cm. 
Yellow : out, 14 cm. ; in, 13 cm. Blue : out, 14 cm. ; in, 14 cm. 
(3) Left Horizontal Meridian. (Nasal retina.) 
Yellow: out, ii cm.; in, 11 cm. Blue: out, 12 cm.; in, 10 cm. 
(4) Lower Vertical Meridian. (Lower retina.) 
Yellow : out, 9 cm. ; in, 8 cm. Blue : out, 9 cm. ; in, 8 cm. 
(5) Upper Vertical Meridian. (Upper retina.) 
The limit of the colour-zone in this experiment lay beyond the limits of the 
campimeter.1 2 Approximate values were : 
Yellow : in and out, 13 cm. Blue : in and out, 13 cm. 
Equations employed on other occasions were : 
Yellow 2540 + Black 106°= Blue 255°+ White 105°; 
“ 185°+ “ 175°= “ 290°+ “ 70°. 
It will be noticed that the blue and yellow of the Hering papers 
gave, in these experiments, the primary psychological blue and 
yellow, whereas the red and green of the papers both demanded 
an intermixture of blue. The ‘black ’ of the experiments is the 
velvet-black, not the black tissue-paper, of the Hering series. 
Questions. —(1) The reason is, that the extent of the zones, 
though constant for a stimulus of given extent and intensity, 
1 The Hering screens are 69.6 cm. long by 23.3 cm. wide. The circular opening 
(1.4 cm. in diameter) is so placed that the longitudinal distances on either side are 
279 and 40.3 cm., and the vertical 11.1 and 10.8 cm., respectively.
        

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