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Johannes Alfons Karl [3]Johannes A. Karl [2]
  1.  27
    A Primer to Multi-Group Invariance Testing Possibilities in R.Ronald Fischer & Johannes A. Karl - 2019 - Frontiers in Psychology 10.
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  2.  20
    Rapid Review and Meta-Meta-Analysis of Self-Guided Interventions to Address Anxiety, Depression, and Stress During COVID-19 Social Distancing.Ronald Fischer, Tiago Bortolini, Johannes Alfons Karl, Marcelo Zilberberg, Kealagh Robinson, André Rabelo, Lucas Gemal, Daniel Wegerhoff, Megan Chrystal & Paulo Mattos - 2020 - Frontiers in Psychology 11:563876.
    We conducted a rapid review and quantitative summary of meta-analyses that have examined interventions which can be used by individuals during quarantine and social distancing to manage anxiety, depression, stress and subjective well-being. A literature search yielded 34 meta-analyses (total number of studies k = 1,390, n = 145,744) that were summarized. Overall, self-guided interventions showed small to medium effects in comparison to control groups. In particular, self-guided therapeutic approaches (including cognitive-behavioral, mindfulness, and acceptance-based interventions), selected positive psychology interventions, and (...)
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  3.  19
    Rituals, Repetitiveness and Cognitive Load.Johannes Alfons Karl & Ronald Fischer - 2018 - Human Nature 29 (4):418-441.
    A central hypothesis to account for the ubiquity of rituals across cultures is their supposed anxiolytic effects: rituals being maintained because they reduce existential anxiety and uncertainty. We aimed to test the anxiolytic effects of rituals by investigating two possible underlying mechanisms for it: cognitive load and repetitive movement. In our pre-registered experiment, 180 undergraduates took part in either a stress or a control condition and were subsequently assigned to either control, cognitive load, undirected movement, a combination of undirected movement (...)
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  4.  14
    The Complexities of “Minding the Gap”: Perceived Discrepancies Between Values and Behavior Affect Well-Being.Megan Chrystal, Johannes A. Karl & Ronald Fischer - 2019 - Frontiers in Psychology 10.
    Research on self-determination theory and clinical models such as acceptance and commitment therapy has shown that behaving in line with our values is key to maintaining healthy well-being. Combining work on values and experimental studies on moral hypocrisy and well-being, we experimentally tested how behaving incongruently with values affects well-being. We hypothesized that discrepancies between how one thinks one should have behaved and how one reported one did behave would be more detrimental to well-being when the behaviors were value-expressive and (...)
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  5.  2
    Testing the Effectiveness of the Health Belief Model in Predicting Preventive Behavior During the COVID-19 Pandemic: The Case of Romania and Italy.Johannes Alfons Karl, Ronald Fischer, Elena Druică, Fabio Musso & Anastasia Stan - 2022 - Frontiers in Psychology 12.
    We use a cultural psychology approach to examine the relevance of the Health Belief Model for predicting a variety of behaviors that had been recommended by health officials during the initial stages of the COVID-19 lockdown for containing the spread of the virus and not overburdening the health system in Europe. Our study is grounded in the assumption that health behavior is activated based on locally relevant perceptions of threats, susceptibility and benefits in engaging in protective behavior, which requires careful (...)
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