The blowfish effect: children and adults use atypical exemplars to infer more narrow categories during word learning.

This is a laboratory word-learning study, not a clinical trial or therapy outcome study. The paper does not report clinical diagnoses, therapy goals, or patient outcomes. The sample was 40 children and 43 adults, and the children were monolingual English speakers aged four and five years. Typicality was tested within participants with atypical trials presented after typical trials in the main design, although the authors note a reversed-order replication. The exploratory category-knowledge analysis divided the 40 children into two groups of 20 and is described as much less powered than the planned analyses. The marginal distractor effect disappeared after removing one outlier subject, so distractor selection is not a robust finding. The task used made-up words and four categories (dog, fish, bird, flower), so it may not capture word learning in everyday conversation.

Do not conclude that using atypical pictures is a therapy technique that improves word learning. The study measured how children and adults inferred the meaning of made-up words in a controlled task, not whether a treatment helped a patient.