Individual comparisons of the error rates for compatible and incompatible trials per language group.

<p>Individual comparisons of the error rates for compatible and incompatible trials per language group.</p

Average scores on language tests, self-reported language contact/use, and socio-economic status of the language groups.

<p>Average scores on language tests, self-reported language contact/use, and socio-economic status of the language groups.</p

Individual comparisons of the RTs for compatible and incompatible trials per language group.

<p>Individual comparisons of the RTs for compatible and incompatible trials per language group.</p

Mean response times of the high-proficiency and the low-proficiency group for correct responses as a function of response direction and stimulus.

<p>Error bars represent 95% confidence intervals [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0193349#pone.0193349.ref067" target="_blank">67</a>].</p

Descriptive information about class level, school type, and bilingualism [57] of our participants.

<p>Descriptive information about class level, school type, and bilingualism [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0193349#pone.0193349.ref057" target="_blank">57</a>] of our participants.</p

Mean percentage of errors of the high-proficiency and the low-proficiency group as a function of response direction and stimulus.

<p>Error bars represent 95% confidence intervals [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0193349#pone.0193349.ref067" target="_blank">67</a>].</p

Mean response times for correct responses as a function of response direction and stimulus for the different language groups separately.

<p>Error bars represent 95% confidence intervals [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0193349#pone.0193349.ref067" target="_blank">67</a>].</p

Example item from the used adaptation of the TRPS [45].

<p>The child is expected to fill in the preposition <i>über</i> (<i>Der Wecker steht über dem Bett / The alarm clock is standing above the bed)</i>.</p

Experimental setup.

<p>The keyboard was implemented under a vertical plane in front of the participants. At the beginning of each trial, the participant pressed the middle key with their dominant hand. A response was made by releasing the middle button, pressing the upper or lower button, and returning back to the middle button.</p

Single comparisons of the RTs for compatible and incompatible trials per proficiency group.

<p>Single comparisons of the RTs for compatible and incompatible trials per proficiency group.</p