Disentangling Vocabulary Restriction Effects from Metalinguistic Self-Monitoring Confounds

Establish whether the observed restructuring effects under vocabulary constraints such as No-Have (which removes possessive uses of "to have") and E-Prime (which removes the copula "to be") are driven primarily by the specific vocabulary restrictions or by the general demand for metalinguistic self-monitoring imposed by elaborate constraint prompts. Develop and evaluate an active control that matches prompt elaborateness without restricting vocabulary to isolate the source of the effect.

Background

Across experiments, constrained prompts are more elaborate than controls, raising the possibility that effects stem from increased self-monitoring rather than the specific words removed. The authors argue that divergent task profiles between E-Prime and No-Have point to vocabulary-specific effects but acknowledge that this cannot be definitively established without an active control.

They identify the absence of an active control as the primary methodological limitation and emphasize that resolving this uncertainty is essential for attributing restructuring effects to the constraints themselves rather than to prompt complexity or metalinguistic monitoring demands.