Table 2 ORT trial structure by variant.

From: Social housing status impacts rhesus monkeys’ affective responding in classic threat processing tasks

 

Variant 1

Variant 2

Variant 3

Variant 4

Number of test days

6

12

5

10

Trial structure

(1) Food only

(2) Food + simple

(3) Food + medium

(4) Food + complex

(5) Food only

(1) Food only

(2) Food + simple

(3) Food + medium

(4) Food + complex

(5) Food only

(1) Food only

(2) Food + complex

(3) Food only

(4) Food + complex

(5) Food only

(6) Food + complex

(1) Food only

(2) Food + simple

(3) Food only

(4) Food + complex

(5) Food only

(6) Food + simple

(7) Food only

(8) Food + complex

(9) Food only

  1. Trial structure for each variant of ORT. Only trials comparable across variants were included in the analyses here. The stimuli used across variants were similar in size and structure and largely overlapping. In all four cases, complex stimuli were a combination of children’s toys (e.g., toy snake, lizard, bear) and household objects (e.g., lampshade, book, scrub brush). Simple stimuli were featureless objects of equivalent size and shape (e.g., blocks of wood or clay). An additional stimulus category (“medium”) was not included in the present analyses because they were only used in Variants 1 and 2. Stimuli in that category included modified forms of the complex stimuli which obscured eyes and other facial features or were simply the complex stimuli presented backwards so that monkeys could not see these features.
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