Kwestionariusz Altruizmu Krewniaczego – podstawy teoretyczne, konstrukcja narzędzia i jego charakterystyka psychometryczna
Kin Altruism Questionnaire – theoretical foundations, construction of the tool and its psychometric characteristics

Summary/Abstract: The article presents the concept of kin altruism, the stages of work on the construction of the Kin Altruism Questionnaire and its psychometric properties. The tool is used to measure the intensity of altruism towards relatives, defined as the tendency to act consciously and voluntarily on their behalf. According to the evolutionary approach to social behavior, people feel obliged to provide care to relatives (children, grandchildren, siblings, cousins) because they are driven by the pressure of survival. To assess the psychometric properties, data obtained from a sample of 107 people aged 18–66 (M = 27.0; SD = 8.18) were analyzed. These data allow the questionnaire to be considered as a tool with a single-factor structure and to confirm its theoretical validity, which was verify by using the A–N Questionnaire, the Family Support subscale from the Familism Scale and the Uncontrollable Causativity Scale. The Kin Altruism Questionnaire is a reliable tool (α Cronbach’s value is 0.91), consisting of 13 statements that refer to possible actions taken for the benefit of close relatives. These are items that were found to be accurate as a result of the experts rating method and, on this basis, were selected from the initial set of 25 sentences describing behaviors considered as possible manifestations of kin altruism.

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