Perceived depth between familiar objects.

Gogel, Walter C.; Mertens, Henry W.; United States. Office of Aviation Medicine

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Perceived depth between familiar objects.

1967-08-01
By Gogel, Walter C. ; Mertens, Henry W.

[PDF-430.62 KB]

English

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Creators:

Gogel, Walter C. ; Mertens, Henry W.

Gogel, Walter C. ; Mertens, Henry W. Less -
Corporate Creators:

United States. Office of Aviation Medicine
Subject/TRT Terms:

[+]

Air Pilots Depth Depth Perception Distance Distance Perception Distances Experiments Eye Eye Fixations Eye Location Human Subject Testing Judgment Judgment (Human Characteristics) Luminance Luminescence Shape Shapes Size Size Perception Vision Vision--Testing Vision Tests Visual Perception
Publication/ Report Number:

AM 67-20 ; DOT/FAA/AM-67/20

AM 67-20 ; DOT/FAA/AM-67/20 Less -
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

Civil Aerospace Medical Institute
Abstract:

In aviation, size cues are frequently used in a pilot's evaluation of depth or distance. In the study, the hypothesis was examined that the essential factor in the size cue to depth from familiar objects is the perceived size S' per unit of retinal size theta of each of the objects, with the object having the largest value of S'/theta appearing to be the more distant object.

Five familiar objects (a box of cough drops, a half dollar, a tape dispenser, a door key, and a tube of toothpaste) were simulated. The objects were presented in pairs and the Os indicated their perceived width (S'), the perceived distance (D') of each from himself, and the perceived depth (d') between the objects in each pair. In agreement with the above hypothesis, the results indicate that the perceived depth between the objects was a monotonic function of the difference between the values of S'/theta. The average values of d' and D' were similar to the simulated values for distances up to approximately three feet from the observer. For greater distances the error in the average d' and D' values increased with an increase in the simulated distances.

The study supports the notion that the familiar size cue to depth can occur between objects of dissimilar shape whenever these objects have perceived sizes. The concept of S'/theta as the significant factor in the familiar size cue to depth permits this cue system to be of significance in a wide variety of naturally occurring situations.
Format:

PDF
Collection(s):

FAA Civil Aerospace Medical Institute US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:4d0c85a645dd5bc5c67b4856689dd839b15ce17e4b4d6f1991dec88cc74f23cd
Download URL:

https://rosap.ntl.bts.gov/view/dot/20833/dot_20833_DS1.pdf
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Perceived depth between familiar objects.

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