Skip to main content

Table 2 The verbal descriptions used in the annotations conditions in Experiment 2

From: Evaluating the effectiveness of different perceptual training methods in a difficult visual discrimination task with ultrasound images

Grade

Feature 1

Feature 2

Feature 3

1

The liver tissue in the background (i.e. not directly adjacent to vessels) is not particularly bright

Blood vessels have bright white lines adjacent to their wallsb

The brightness of the lower tissue is similar to the upper tissued

2

The liver tissue in the background (i.e. not directly adjacent to vessels) is brighter than normal (grade 1)a

b

d

3

a

Blood vessels have white lines adjacent to their walls, but these are generally less bright than in grade 2

d

4

a

Some blood vessels do not have white lines adjacent to their walls. Some vessels do have white lines adjacent to their walls

d

5

a

Most blood vessels do not have white lines adjacent to their wallsc

d

6

a

c

The lower tissue is slightly darker than the upper tissue

7

a

Almost none of the blood vessels have white lines adjacent to their walls

The lower tissue is clearly darker than the upper tissue

  1. The first feature relates to the brightness of the background tissue, the second feature relates to the lines around vessels, and the third feature relates to the gradient between the lower and upper tissue. The same feature description could apply to more than one grade, as indicated by the letters a, b, c, and d. For example, the second description for the first feature (a) applied to grade two and above. In the two Steps conditions, the three features were learned incrementally over each training block (i.e. the first feature in the first training block and so on)