This project explored whether mindfulness and acceptance-based practices (MABPs) for older adults would reduce the negative effects of ageism and negative attitudes and beliefs related to aging. In addition, state affect and stress were explored. This study used an experimental design to compare two groups of older adults and two groups of undergraduate students – those who received a MABP and those who did not, after being presented with negative ageist stereotypes. Condition and condition by age sample comparisons revealed several findings. Following the MABP, undergraduates who received a MABP had significantly lower ageism scores than did undergraduates who did not. Older adult findings were opposite of proposed hypotheses, with older adults having higher scores on ageism after receiving the MABP, as compared to the scores of older adults who were in the comparison condition. Differences in state mindfulness were seen between conditions, with the MABP condition exhibiting more state mindfulness than in the comparison condition. However, there was no significant condition by age sample interaction effect. Change scores for state affect after the MABP were non-significant at either level of analysis, and older adults showed no difference in digit span stress scores based on their condition assignment. Exploratory analyses revealed some research consistent, as well as nuanced, findings. These findings suggest that undergraduates may respond to MABPs for recontextualizing aging, discrimination, and stigma. These findings also suggest that older adults may employ different coping strategies when confronted with ageism in an experimental context when asked to reflect, as oppose to participate in MABPs. Overall, a need for aging education, experimental research with older adults, and empirical understandings of MABPs for age-related issues, is needed. Limitations and future directions are discussed.