H1
Working through causality questions can feel overwhelming, so here's a framework. For each hypothesis, walk through the three criteria one at a time:
Association — Did the authors find a statistical relationship between the IV and DV in this specific hypothesis? Look at the results section. Was the hypothesis supported, partially supported, or unsupported? Temporal order — Did the IV come before the DV in time? In a true experiment with random assignment, the manipulation always comes first by design. But watch for cases where the "IV" was actually MEASURED rather than manipulated — those weaken the temporal order claim because measurement and outcome happen close together in the survey. Non-spuriousness — Did the design rule out third variables? Random assignment is the main tool here. If participants were randomly assigned to conditions, pre-existing differences should be roughly equal across groups. If the IV was measured (not manipulated), there's no random assignment to that variable, and confounds become a real concern.
Watch out: this study has a mix of MANIPULATED variables (sponsorship cue, training video — both randomly assigned) and MEASURED variables (perceived selling intent, perceived informative intent). Some hypotheses test relationships involving measured variables, where causality claims are weaker even though the overall study uses random assignment. For a walk-through of how to apply these criteria to real experimental studies (3 examples): https://youtu.be/GaoRbiROyEw For a longer, more detailed in-class version: https://www.youtube.com/watch?v=xcItkXe9G6E