Cross-Media Repertoires, Communication Efficacy, and Environmental Voice in Latin America: A Two-Study Analysis

Citizens encounter climate and science information through journalistic, digital, and interpersonal channels, yet evidence on how these combinations relate to engagement in Latin America remains limited. Study 1 analyzes 19,214 Latinobarómetro interviews in 17 countries. Weighted latent class analysis (LCA) identified five climate-information repertoires. Broader repertoires were associated with greater communication efficacy, but this H1 pattern was substantially attenuated after adjustment for environmental values. Efficacy related more strongly to environmental voice—public-facing action intended to influence others or institutions—than to private household practice (classification-corrected interaction OR = 1.094, p = 0.002). Digital-social and omni-channel profiles formed a high-voice tier. Study 2 uses 5948 Trust in Science and Science-Related Populism (TISP) respondents in 10 countries. BIC selected four science-information repertoires; five-fold prediction offered only weak additional support. Omni-channel respondents reported more science discussion, protest, and climate-scientist trust than low-intensity respondents, whereas policy-support differences were not robust. Overlap-removal analyses preserved both studies’ central results. Cross-country diagnostics favored common loadings but not thresholds, and common-profile LCAs were parsimonious despite national heterogeneity. These cross-sectional results associate cross-channel complementarity with communicative participation, not causal media effects or changed policy preferences.