Research source

VI. Other forms of involuntary indications; "involuntary whispering;" the subconscious 334

Date of account: Published 1900
Source: Fact and Fable in Psychology
Reference: Fact and Fable in Psychology · selected passage 142
Rights: public_domain
Language: English
Record updated: 2026-08-24

Record summary

I give a further illustration of such a change in Fig

Published source text

Read the available text below. Archive transcriptions may contain OCR errors; later context is labelled separately. A recorded claim is not a finding that it happened.

Source passage

Source text · mention only

I give a further illustration of such a change in Fig. 5. In our first and natural view of this we focus the attention upon the black lines and observe the familiar illusion, that the four vertical black bands seem far from parallel. That they are parallel can be verified by measurement, or by covering up all of the diagram except the four main bands. But if the white part of the diagram be conceived as the design against a black background, then the design is no longer the same, and with this change the illusion disappears, and the four bands seem parallel, as they really are. It may require a little effort to bring about this change, but it is marked when once realized.

Historical context

Contextual commentary · mention only

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Modern context

Contextual commentary · mention only

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