The Impact of Birth Order on Decision-Making Styles and Confidence: An Exploratory Study

This study examines the influence of birth order on the decision-making styles and general self-efficacy of adults. Grounded in Alfred Adler's birth order theory and contemporary frameworks of cognitive decision-making, the research explores how one's ordinal position within the family is associated with preferred approaches to making decisions and overall confidence levels. Using a quantitative research design, data were collected from a purposive sample of 388 adults, with birth order, decision-making styles (rational, intuitive, dependent, avoidant, spontaneous), and general self-efficacy measured via validated scales. Findings reveal that firstborns report significantly higher levels of general self-efficacy and a stronger preference for a rational decision-making style, while lastborns show a greater propensity for an intuitive decision-making style. Mediation analysis indicates that self-efficacy partially explains the relationship between birth order (firstborn vs. lastborn) and rational decision-making. The study highlights that birth order functions as a probabilistic factor that shapes confidence, which in turn influences cognitive strategies for decision-making. Implications for organizational behavior, team composition, and personal development include leveraging innate strengths and designing targeted training to build complementary skills across different birth order profiles.