Question completion status: evans, otto and kaiser (2018) recruited 99 children and their mothers from a rural and suburban area of the northeast united states to participate in a 12-year longitudinal study, which tracked the children from ages 6 to 18. when the children were 6 years old, the researchers assessed the mothers' pro-environmental attitudes and behaviors. mothers completed the new environmental paradigm (nep), a self-report measure of general ecological behavior (geb) scale, a self-report measure of environmental behaviors, including how much time the children spent outdoors. at age 18, 74 of the children returned to complete the second round of data collection. the young adults completed the same versions of the nep and geb scales that their mothers had completed 12 years before. the longitudinal data showed that individuals whose mothers had had more pro-environmental attitudes demonstrated more pro-environmental behaviors themselves as 18 year old young adults. also those who had spent more time outdoors when they were children (according to their mothers' geb) tended to report more environmentally responsible behavior and attitudes as young adults. a evans, otto and kaiser a researchers d. mothers' pro-environmental attitudes and behaviors b. 99 children and their mothers d. how much time the children spent outdoors e. 18 year old young adults' pro-environmental attitudes and behaviors k. what kind of research study method is this? b. participants c. independent variable (manipulated) d. independent variable (selected) e. dependent variable f. descriptive variable g. predictor variable h. outcome variable 1. confounding variable jo experimental research k. quasi-experimental research l. correlational research m. descriptive research - father's pro-environmental attitudes and behaviors