Preregistration in Practice: Research 1) Unreviewed Preregistration

1. WHERE TO PREREGISTER?

A) Reviewed pre-reg report -> See section "Preregistration in Practice: Research 2) Reviewed Preregistered Reports"

B) Unreviewed pre-reg

PUBLIC:

- OSF: https://osf.io/

PRIVATE:

- OSF: https://osf.io/ (timestamped)
- AsPredicted: https://aspredicted.org (timestamped)
- figshare: https://figshare.com/ (timestamped)
- Clinical Studies/Trials: https://clinicaltrials.gov/ct2/home

2. WHAT SHOULD BE PREREGISTERED?

a) Hypotheses

- Describe Hypotheses (Relationship between Variables)
- If applicable - Describe expected shape of Interactions
- If applicable - Describe predictions for manipulation check, i.e. criteria for success of manipulation

b) Method

Design
- Independent variables, all their levels (Within- or Between participants? / Relationship between variables?)
- Dependent Variables
- Third Variables = Covariates or Moderators

Planned Sample
- Pre-selelction rule (if applicable)
- Where, from whom and how is data collected
- Sample Size (a priori power analysis or Baysian design analysis)
- Data collection termination rule

Exluscion Criteria
- Describe anticipated exclusion criteria (e.g. missing, erroneous, overly consistent responses, failing check-tests; demographic exclusions; Data-based outlier; method-based outlier)

C) Analysis Plan: Confirmatory

- Specify contingencies & assumptions
- Method of correction for multiple tests
- Method of missing data handling
- Reliability criteria for item inclusion in scale
- Anticipated data transformation
- Assumptions of Analyses, plans for alternative/corrected analyses if each assumption is violated

d) Analysis Plan: Exploratory

- "We do not have specific a-priori hypotheses"

3. TEMPLATES/RECIPES

- Templates can be found here: https://osf.io/k5wns/

- or here: van't Veer, A. E., & Giner-Sorolla, R. (2016). Pre-registration in social psychology—A discussion and suggested template. Journal of Experimental Social Psychology

- see also: Data Colada [post 64] How to properly preregister a study

These information are based on - useful links:

- For a clear, comprehensive introduction to preregistration see: LMU Workshop Preregistration (Schönbrodt): https://osf.io/yd487/

- For templates see: van't Veer, A. E., & Giner-Sorolla, R. (2016). Pre-registration in social psychology—A discussion and suggested template. Journal of Experimental Social Psychology, 67, 2–12. http://doi.org/10.1016/j.jesp.2016.03.00  https://osf.io/56g8e/

- A helpful FAQ: https://cos.io/prereg/