Number of all arms entered during testing in relation to the level of stereotypic behaviour for each stereotypy form.

<p>Number of all arms entered during testing in relation to the level of stereotypic behaviour for each stereotypy form.</p

Time spent in reference and ambiguous arms during testing.

<p>Higher reference arm score indicates preference for reference arms and avoidance of ambiguous arms, while a negative score indicates more time spent in ambiguous arms.</p

C57BL/6 mice with higher levels of RT displayed higher numbers of pure repetitions (LLLL, RRRR) in the guessing task.

<p>BM level did not correlate with number of repetitions.</p

Distribution of tetragrams of left (L) and right (R) choices in the guessing task.

<p>Distribution of tetragrams of left (L) and right (R) choices in the guessing task.</p

Eight arm radial maze used for testing cognitive bias.

<p>The radial maze contained four reference arms, two associated with positive outcomes (black) and two with negative outcomes (white), and four ambiguous arms, two of them adjacent to positive arms (dark grey) and the other two adjacent to negative arms (light grey). During training the four ambiguous arms were closed, while during testing all eight arms were open. The arms of the maze were not coloured. We highlighted them in the figure to make it easier for the reader to distinguish between positive, near-positive, near-negative and negative arms.</p

Effect of stereotypy level on measures of recurrent perseveration in the guessing task.

<p>Effect of stereotypy level on measures of recurrent perseveration in the guessing task.</p

Timeline of the study.

<p>Timeline of the study.</p

Effects of stereotypy level, form and session on the cognitive bias task measures in CD-1 mice during training and testing.

<p>Effects of stereotypy level, form and session on the cognitive bias task measures in CD-1 mice during training and testing.</p

Effects of stereotypy level, form and session on the cognitive bias task measures in C57BL/6 mice during training and testing.

<p>Effects of stereotypy level, form and session on the cognitive bias task measures in C57BL/6 mice during training and testing.</p

Apparatus used for the guessing task.

<p>Both compartments and the start box were separated by guillotine doors operated manually.</p