In my research, I use a multi-method approach including experimental, longitudinal, and cross-cultural designs and different types of measures (e.g., physiological measures, implicit measures, eye tracking, content analysis, and self-report). I have made conceptual and empirical contributions to lifespan psychology in three key areas: (a) Self, Identity, and Aging, (b) Stereotypes,Mindsets, and Health and (c) Social Status and Social Inequality.

Contributions to the literature on aging and lifespan development:

(1) The Model of the Dual Age Identity (Weiss & Lang, 2009; 2012b; Weiss, 2014; Weiss & Perry, 2020; Weiss & Zhang, 2020)

(2) A Functional Approach to Traditional Gender Ideology (Weiss, Freund, & Wiese, 2012; Freund, Weiss, & Wiese, 2013; Weiss, Wiese, & Freund, 2014)

(3) Age Group Dissociation and Subjective Aging (Weiss & Lang, 2012a; Weiss & Freund, 2012; Weiss, Sassenberg, & Freund, 2013; Zee & Weiss, 2019; Weiss & Kornadt, 2018; Weiss & Weiss, 2019; Blöchl, Nestler, & Weiss, 2020)

(4) (Non) Essentialist Beliefs About Aging (Weiss, Job, Mathias, Grah, & Freund, 2016; Weiss, 2018; Weiss, Reitz, & Stephan, 2019, Weiss & Diehl, 2021; Weiss, Weiss, & Zacher, 2022)

(5) A Lifespan Perspective on Social Status (Weiss & Weiss, 2016; Robertson & Weiss, 2017; 2018; Weiss & Kunzmann, 2020; Weiss, Greve, & Kunzmann, 2022; Weiss, Weiss, Rudolph, & Zacher, 2022; Weiss & Blöchl, 2023)