Friendship constitutes an important facet of human behavior, and the current research investigated the reasons that motivate people to make friends. First, a combination of qualitative research methods were used to identify 41 perceived reasons why people make friends. Using a sample of 1,316 Greek‐speaking participants, these reasons were classified into five broad factors. Participants indicated that the most important reasons for making friends were to receive social input, support, and because of someone else's good qualities. Sex differences and age effects were found in most factors. Finally, the five factors were classified into two broader domains, the first reflecting motivation to make a true friendship and the second to gain opportunistic benefits.

中文翻译：

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人们为什么交朋友：友谊的本质

友谊是人类行为的重要方面，目前的研究调查了促使人们结交朋友的原因。首先，使用定性研究方法的组合来确定人们认识朋友的41个感知原因。通过对1,316名讲希腊语的参与者进行抽样，将这些原因分为五个主要因素。参与者指出，结交朋友的最重要原因是获得社会投入，支持和其他人的良好品质。在大多数因素中发现性别差异和年龄影响。最后，这五个因素被分为两个更广泛的领域，第一个反映了建立真正友谊的动机，第二个反映了获得机会主义利益的动机。