Table 1 Calculated viewing distances of each condition using Virtual Chinrest in Exp. 2, a 3 × 2 within-subjects lab study.

From: Controlling for Participants’ Viewing Distance in Large-Scale, Psychophysical Online Experiments Using a Virtual Chinrest

Actual Distance

(cm)

Estimated Distance

Mean (Avg. Abs. Err)

13″

23″

Average

43

47.2 (4.6)

44.3 (2.4)

45.8 (3.5)

53

55.7 (4.2)

53.6 (1.6)

54.7 (2.9)

66

63.7 (2.4)

61.7 (4.4)

62.6 (3.4)

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