The best fitting theoretical models (dotted line) <i>vs</i> empirical results (red points).

<p>The choice probability as a function of the proportion of the chosen response category for four observers, two discrimination tasks (color and orientation), and two numbers of elements (<i>N</i> = 9 and 13). Each point is a probability estimate computed from 100 trials. The dotted line represents the best fitting theoretical mixture model shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0029667#pone-0029667-t001" target="_blank">Tables 1.A</a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0029667#pone-0029667-t002" target="_blank">2.A</a>.</p

Stimulus configurations in the two experiments.

<p>Schematic view of stimulus configurations used in the numerosity discrimination experiment using color (left panel) or orientation (right panel) as a distinctive attribute.</p

All possible theoretical models.

<p>All possible theoretical models corresponding to binomial (bin<i>_K</i>) or hypergeometric (hyp<i>_K</i>) distributions with the length of trials <i>K</i>.</p

Age differences in NEO-PI-3 facet scores.

<p>The scores are based on measurement models that demonstrated partial measurement invariance. The facets are number according to the NEO-PI-3 manual (see also <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0119667#pone.0119667.t002" target="_blank">Table 2</a>). Horizontal axis represents 12 age groups. Vertical axis represents the mean age group scores (in the standard deviation units of the youngest group).</p

Age differences in FFM domain scores before and after establishing partial measurement invariance.

<p>Horizontal axis represents 12 age groups. Vertical axis represents the mean age group scores (in the standard deviation units of the youngest group).</p

Age differences in the 30 NEO-PI-3 facets before (dashed lines) and and after (solid lines) establishing partial measurement invariance.

<p>Horizontal axis represents 12 age groups. Vertical axis represents the mean age group scores (in the standard deviation units of the youngest group).</p

Age-related measurement invariance in the NEO-PI-3 facets: the changes in Comparative Fit Indices and Root Mean Square Error of Approximation values as a result of imposing increasingly strict parameter constraints in the measurement models of different age groups.

<p>Age-related measurement invariance in the NEO-PI-3 facets: the changes in Comparative Fit Indices and Root Mean Square Error of Approximation values as a result of imposing increasingly strict parameter constraints in the measurement models of different age groups.</p

Fit statistics for the models of the FFM domains.

<p>Fit statistics for the models of the FFM domains.</p

Fit statistics for the facet models.

<p>Fit statistics for the facet models.</p

The number of people in each age group.

<p>The number of people in each age group.</p