Questionnaires also produce very low return rates, whether they are mail or online questionnaires. Such a questionnaire is well-suited for the investigation of correlations with other questionnaires. Early pilot stress report systems were adapted and modified from existing psychological questionnaires and surveys. Response biases can have a large impact on the validity of questionnaires or surveys. Survey methodology includes questionnaires, interviews, and focus groups. Survey methods into expected product lifetimes encompass online questionnaires, household and telephone interviews. The facilitator sends out questionnaires, surveys etc. Informant questionnaires provide complementary information to brief cognitive tests. The RSES is designed similar to the social-survey questionnaires. Primary data is data collected specifically for the research, such as through interviews or questionnaires. Questionnaires and certain blood tests may detect possible alcoholism. Methods used in the studies reported included questionnaires and content analysis. Kano also produced a methodology for mapping consumer responses to questionnaires onto his model. Spielberger also created other questionnaires, like the STAI, that assessed other emotions. Such tools could be quizzes, calculators, chats', questionnaires.