Table I
The Dependence of the Visual Task Complexity (Time of Detection) on the Degree of Resemblance of
the Shapes Being Detected for the Targets Equal in Areas to the Disk of α
= 4′ Angular Dimension with K = 0.68
| Pairs of targets forming succession | 1–2 | 1–3 | 1–5 | 1–6 | 1–7 | 1–8 | 1–9 |
| τ1 is the time of target
exposition (msec) | 23.0 | 19.0 | 18.0 | 16.2 | 15.0 | 13.0 | 13.5 |
Table II
The Dependence of the Visual Task Complexity (Time of Detection) on the Degree of Resemblance of
the Shapes Being Detected for the Targets Equal in Areas to the Disk of α
= 20′ Angular Dimension with K = 0.68
| Pairs of targets forming the pack | 1–2 | 1–3 | 1–5 | 1–8 | 1–9 |
| τsum is the time between the
beginning of the target effect and that of the response (sec) | 306 | 259 | 233 | 219 | 201 |
Table III
The Change of the Relative Rate of Shape Detection Against the Degree of Resemblance of the
Target Being Detected When Varying the Test Angular Dimensions (in Each Case Its Own Absolute Rate
of Target Detection in 1–2 Pair is Taken for the Unit)
| Visual task under test conditions | Shapes being detected |
|---|
|
|---|
| 1–2 | 1–3 | 1–5 | 1–6 | 1–8 | 1–9 |
|---|
| Identification of target shapes in the successive row of
α = 4′, K = 0.68 | 1.00 | 1.21 | 1.28 | 1.42 | 1.77 | 1.70 |
| Distribution of the pack α =
20′, K = 0.68 | 1.00 | 1.18 | 1.31 | 1.38 | 1.40 | 1.52 |
Table IV
The Dependence of the Visual Task Complexity (Time of Detection) on the Degree of Resemblance of
the Shapes Being Detected for the Targets Equal in Areas to the Disk of α
= 20′ Angular Dimension with K = 0.94
| Pairs of objects forming the table | 1–2 | 1–3 | 1–5 | 1–8 | 1–9 |
| τsum is the time between the
beginning of the target effect and that of the response (msec) | 78 | 64 | 60 | 56 | 53 |
Table V
The Change of the Relative Rate of Shape Detection Against the Degree of Resemblance of the
Targets Being Detected When Varying the Contrast of the Target with the Background (in Each Case Its
Absolute Time of Target Detection in 1–2 Pair is Taken for the Unit)
| Visual task under test conditions | Shapes being detected |
|---|
|
|---|
| 1–2 | 1–3 | 1–5 | 1–8 | 1–9 |
|---|
| Distribution of the pack α =
20′, K = 0.68 | 1.00 | 1.18 | 1.31 | 1.40 | 1.52 |
| Crossing out in tables α =
20′, K = 0.94 | 1.00 | 1.21 | 1.28 | 1.39 | 1.45 |
Table VI
Comparison of the Complexity of the Visual Tasks on Revelation and Detection
| Time of revelation or detection | Shape revelation | | Shape detection | Shape revelation | | Shape detection |
|---|
| |
|
| |
|
|---|
| 2 | | 1–2 | 8 | | 1–8 |
|---|
| τ(msec) | 2.7 | | | 4.6 | | |
| τ1(msec) | | | 23.0 | | | 13.0 |
| M =
τ1/τ | | 8.56 | | | 2.84 | |
Table VII
Comparison of Time of Detection and That of Revelation with Varying Target Angular Dimension
| Angular dimension of the target for revelation or
detection | Revelation (with p =
0.6) | Detection (with p =
0.6) | M =
τ1rel/τrel |
|---|
|
|
|---|
| τ(msec) | τrel | τ1(msec) | τ1rel |
|---|
| α1 = 4′ | 5.29 | 1.00 | 31.8 | 1.00 | 1.00 |
| α2 = 8′ | 3.57 | 0.67 | 23.6 | 0.74 | 1.10 |
| α3 = 16′ | 2.30 | 0.43 | 16.5 | 0.52 | 1.20 |
Table VIII
Comparison of the Time of Detection and That of Revelation when Varying the Target Contrast with
the Background
| Contrast of the targets for revelation or detection
with the background | Revelation (with p =
0.6) | Detection (with p =
0.6) | M =
τ1rel/τrel |
|---|
|
|
|---|
| τ(msec) | τrel | τ1(msec) | τ1rel |
|---|
| K1 = 0.82 | 2.19 | 1.00 | 14.0 | 1.00 | 1.00 |
| K2 = 0.68 | 2.69 | 1.23 | 20.5 | 1.46 | 1.19 |
| K3 = 0.35 | 5.29 | 2.41 | 30.0 | 2.15 | 0.89 |
Table IX
The Influence of Contrast Change on the Complexity of Visual Detection Under Strain Work
Conditions
| Shape of target being detected | Contrasts
Ki | Average time of detection (for p =
0.95) | Relative average time of detection (p =
0.95) |
|---|
|
|
|---|
| τ1(msec) | τrel |
|---|
| 1–3 | K1 = 0.82 | 374 | 1.00 |
| K2 = 0.68 | 384 | 1.03 |
| K3 = 0.35 | 400 | 1.07 |
Table X
Comparison of Contrast Effect on the Complexity of Visual Detection Under Free and Strain Work
Conditions
| Working conditions and target characteristics |
|---|
|
|
|---|
| Free conditions
αd = 4′, p
= 0.6, Bb = 100 nit | Strain conditions
αd = 25′, p
= 0.95 Bb = 100 nit |
|---|
|
|
|
|---|
| Contrasts | Revelation τrel | Detection of 1–3 pair
τ1rel | Revelation τrel | Detection of 1–3 pair
τ1rel |
|---|
| K1 = 0.82 | 1.00 | 1.00 | 1.00 | 1.00 |
| K2 = 0.68 | 1.23 | 1.46 | 1.25 | 1.03 |
| K3 = 0.35 | 2.41 | 2.15 | 2.31 | 1.07 |
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