title: Measures of Bayesian Reasoning Performance on 'Normal' and 'Natural' Frequency Tasks.
abstract: While the majority of similar studies examining Bayesian reasoning investigate how participants avoid common errors such as base-rate neglect, the current research also examines whether different formats (frequency and probability) lead to a difference in levels of absolute accuracy. In Study One, older (≥60 years) and younger (18 to 29 years) participants completed tasks in probability and normalized frequency formats. In Study 2, participants completed tasks in probability and natural frequency formats. Findings are that frequencies lead to less over-estimation, particularly in natural frequency tasks, which also reveal an interaction between age and task format whereby older adults seem unaffected by format. There was no association found between format and the avoidance of errors such as base-rate neglect. Findings are discussed in the light of dual and multi-process theories of reasoning, having failed to support the theory that frequency formats elicit System 2 reasoning processes.
authors.affiliation: a University of West London.
authors.forename: Rosemary
authors.initials: R
authors.lastname: Stock
authors.affiliation: b University of Central Lancashire.
authors.forename: John E
authors.initials: JE
authors.lastname: Fisk
authors.affiliation: c Liverpool John Moores University.
authors.forename: Catharine
authors.initials: C
authors.lastname: Montgomery
mesh_terms: D000293:Adolescent; D000328:Adult; D000375:Aging / Q000523:psychology; D001499:Bayes Theorem; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D056510:Position-Specific Scoring Matrices; D011336:Probability; D011340:Problem Solving; D012016:Reference Values; D055815:Young Adult
keywords: Bayesian; cognitive aging; natural frequency; probability