Regression analysis using 633 Taiwanese college students revealed that only maternal support had a significant predictive effect on the developmental indecision of male and female college students; furthermore, neither paternal nor maternal support had a significant predictive effect on the indecisiveness of male and female college students. For male college students, maternal tangible assistance predicted a lower level of developmental indecision due to the lack of information on decisions, whereas maternal information support predicted a higher level of developmental indecision due to the lack of information on decisions. For female college students, maternal emotional support predicted a lower level of developmental indecision arising from unreliable information.