Developmental theories of prosocial reasoning and behavior posit a transition from concrete (e.g., give a toy to receive one) to abstract (e.g., spend time to make someone happy) forms and have been supported with research on middle-socioeconomic status (SES), White samples. The methodology that researchers have used to date has restricted the responses that children can offer. In the present study, 122 Grade 2 and Grade 4 children from low-SES families described different types of motives and behavior and whether a conflict existed between self- and other-serving behaviors. The authors found developmental differences for both abstract and tangible motives that focused on the benefactor ...