Bauhaus-Universität Weimar

Experimental Psychology: A Manual of Laboratory Practice, Vol. I: Qualitative Experiments, Part 1: Student's Manual
Titchener, Edward B.
Ideational Type and the Association of Ideas 
A. I. Successive Method. Visual Stimuli 
Materials. — Memory Apparatus. [This apparatus consists 
of a black upright screen, 82 by 21 cm., at the centre of which 
is an oblong window, 15 cm. broad and 3 cm. high. A flap of 
japanned tin, hinged below, can be turned up to cover the window. 
Behind the window slides a horizontal strip of japanned tin, 
having two openings, of 6 by 2.5 and 2 by 2.5 cm. respectively. 
The card holder, 40 by 18 cm., 
runs in grooves behind thescreen. 
To its back is nailed a strip of 
gutta percha, cut out step-fashion 
in such a way that each turn of a 
lever to right or left drops the 
card holder through 2.5 cm. The 
card is covered with letters, nu¬ 
merals, bands of colour, etc. It 
is possible, if the card holder 
starts at its full height, to expose 
14 successive stimuli behind each 
of the openings in the horizon¬ 
tal strip of tin.] 
Stimulus cards. Test cards. 
[These are prepared by E under 
the Instructor’s directions, and 
are not seen by 0.~[ Stop¬ 
Experiment (i). Frequency. 
— The apparatus is set up, in a good light, at a convenient dis¬ 
tance from 0. The horizontal strip is so placed that its larger 
opening fills the centre of the oblong window. It is well to 
stand screens of black cardboard to right and left, so that E 
shall be entirely concealed from view. E selects a stimulus 
card, with its corresponding test card, and slides the former into 
the card holder. The stop-watch lies on the table by his side. 
E takes the string of the shutter in his left, and the lever in 
his right hand. At a “ Now ! ” 0 fixates the centre of the 
shutter. Some 1.5 sec. later, E drops the shutter, and O sees a 
coloured strip in the opening. This remains in sight for 2 sec.


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