20-questions game Adult 1 Article 1 Child 1 Child Development 1 Entropy 1 Female 1 Heuristics 1 Humans 1 Information gain 1 Male 1 Planning 1 Search efficiency 1 Sequential search 1 Split-half heuristic 1 Stepwise-optimal methods 1 Young Adult 1 adolescent 1 adult 1 behavior 1 child 1 child development 1 cognition 1 comparative study 1 computer simulation 1 dependent variable 1 entropy 1 environment 1 female 1 groups by age 1