Meta analysis; Literaturstudie; Literature review; Scientific review ; Language testing ; Evaluation criterion (language testing) ; Emotive communication; Expressive use of language ; Reading performance ; Lexikalischer Zugriff; Lexical decision; Lexical access; Word recognition ; Metalinguistic awareness (in children) ; Phonics (teaching of) ; Phonologische Bewusstheit (bei Kindern) ; Phonological awareness (in children) ; Focus on form (language teaching) ; Sprachbewusstsein (bei Kindern) ; Linguistic awareness (in children) ; Kindersprache (Sprachverständnis) ; Children's comprehension of language; Language comprehension in children