Table 1. Overview of Tests Administered at Time 1 (T1) and Time (T2).

Perspective-Marking Language	Social Cognition	Individual Differences
Mental Verbs: 1st person (T1: predictor, T2: outcome)	False Belief (T1: predictor, T2: outcome)	Short-Term Memory (T1: control)
Mental Verbs: 3rd person (T1: predictor, T2: outcome)	Theory of Mind Precursors (T1: control)	Working Memory (T1: control)
Epistemic Modals (T1: predictor, T2: outcome)	Discarded task:	Verbal Inhibitory Control (T1: control)
Complement-Clause Proficiency (T1: predictor, T2: outcome)	Implicit False Belief (T1: control)	Motoric Inhibitory Control (T1: control)
		Cognitive Flexibility (T1: control)
		Vocabulary (T1: control)
		Grammar (T1: control)