Long-running surveys need a systematic way to reflect social change and to keep items relevant to respondents, especially when they ask about controversial subjects, or they threaten the items' validity. We propose a protocol for updating measures that preserves content and construct validity. First, substantive experts articulate the current and…

Psychological variables (e.g. L2 grit) remain a much under-investigated sub-category of individual differences compared with cognitive ones (e.g. aptitude). The present paper aims to gain a better understanding of the psychological effects of multilingualism by investigating tolerance of homosexuality (TH), which has received little scholarly…