The Effect Of Number Of Dials On Qualitative Reading Of A Multiple Dial Panel

Item

Title
The Effect Of Number Of Dials On Qualitative Reading Of A Multiple Dial Panel
Date
1952
Index Abstract
Coming Soon
Photo Quality
Undetermined
Report Number
WADC TR 52-182
Creator
Senders, V. L.
Corporate Author
Antioch College
Extent
43
NTRL Accession Number
AD006532
Identifier
AD0006532
AD Number
6532
Access Rights
Unknown
Distribution Classification
1
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
AFAL ltr
Distribution Change Action Date
10/15/2001
Abstract
Three experiments were conducted on the time required to make qualitative readings of a panel of dials. The results indicate that reading time is approximately a linear function of the number of dials on the panel. The slope of the line is about 18 times greater when pointers are not aligned than when they are aligned at the 9 o'clock position. For aligned pointers, time increases directly with the distance of the misaligned pointer from the fixation point, either vertical or horizontal. When pointers are not aligned, time bears no regular relation to horizontal distance from fixation point, but increases regularly from top to bottom of panel. It is hypothesized that quantitative differences between performance under the 2 conditions are due to qualitative differences in the manner of scanning the panel. Large practice effects which were observed may be due in part to the expansion of the visual form-field.
Report Availability
Not available via Contrails
Date Issued
1952-01
Index In
50 Years
Type
report