# Preregistration Template — OSF Standard 21-Item Preregistration Template ## Purpose A fill-in template based on the OSF Standard Pre-Data Collection Registration format. Researchers complete this template before data collection and upload it to a preregistration platform (e.g., OSF Registries). --- ## Instructions 1. Complete this template **before** data collection 2. Items marked `[Required]` are mandatory; `[Optional]` are recommended but not required 3. If an item is not applicable, write "Not applicable" and briefly explain why 4. After completion, go to [OSF Registries](https://osf.io/registries) to create a preregistration 5. Once submitted, preregistrations cannot be modified (an embargo period can be set) --- ## A. Study Information ### 1. Title [Required] > Study Title ``` [Enter descriptive study title] ``` ### 2. Authors [Required] > Research Team | Name | Institution | Role | ORCID | |------|-------------|------|-------| | [Name] | [Institution] | [PI / Co-PI / RA] | [ORCID] | | [Name] | [Institution] | [Role] | [ORCID] | ### 3. Research Questions [Required] > Main Research Questions ``` RQ1: [Enter main research question] RQ2: [Enter secondary research question, if any] ``` ### 4. Hypotheses [Required] > Pre-specified Hypotheses > Please state directional predictions clearly ``` H1: [Enter hypothesis 1, including expected direction] Example: Students receiving treatment X will score significantly higher on test Y than the control group H2: [Enter hypothesis 2, if any] H3: [Enter hypothesis 3, if any] ``` --- ## B. Design Plan ### 5. Study Type [Required] > Study Design - [ ] Experiment - [ ] Between-subjects - [ ] Within-subjects - [ ] Mixed design - [ ] Factorial design: ___ x ___ - [ ] Observational study - [ ] Cross-sectional - [ ] Longitudinal / Cohort - [ ] Case-control - [ ] Survey - [ ] Other: [Describe] ``` [Describe study design in detail] ``` ### 6. Randomization [Optional] > Randomization Procedure ``` Randomization method: [Simple random / Stratified random / Cluster random / Block random / Not applicable] Randomization unit: [Individual / Class / School / Not applicable] Randomization tool: [Random number table / Computer program / Lottery / Not applicable] Allocation ratio: [1:1 / 2:1 / Other] ``` ### 7. Blinding [Optional] > Blinding / Masking ``` Blinding level: [No blinding / Single-blind / Double-blind / Triple-blind] Blinded parties: [Participants / Researchers / Assessors / Not applicable] Blinding maintenance: [Describe how blinding is maintained] Unblinding timing: [Describe when unblinding occurs] ``` ### 8. Study Design / Conditions [Required] > Specific description of each group/condition ``` Experimental group/Condition 1: [Describe intervention content, duration, frequency in detail] Experimental group/Condition 2: [If any] Control group: [Describe control condition in detail] ``` --- ## C. Sampling Plan ### 9. Existing Data [Required] > Existing Data Declaration - [ ] No data have been collected yet (Registration prior to creation of data) - [ ] Data exist but have not been examined (Registration prior to any human observation of the data) - [ ] Some data have been examined (Registration prior to accessing the data) - [ ] Data have been used for preliminary analysis (Registration following analysis of the data) ``` [Describe data status and your level of familiarity with the data] ``` ### 10. Data Collection Procedures [Required] > Data Collection Procedures ``` Collection method: [Online survey / Paper survey / Interview / Experiment / Archival data / Other] Collection instruments: [Questionnaire name / Scale name / Experimental software] Collection location: [Online / Classroom / Laboratory / Other] Collection timeline: [Start and end dates] Data collectors: [Who is responsible for collection] ``` ### 11. Sample Size [Required] > Planned sample size ``` Target sample size: [N = ] Sample size per group: [Experimental group n = , Control group n = ] ``` ### 12. Sample Size Rationale [Required] > Basis for sample size determination ``` Method: [Power analysis / Prior research conventions / Feasibility constraints / Other] Power analysis parameters (if applicable): - Effect size: [d = / f = / r = ] - Effect size source: [Prior study / Meta-analysis / Pilot study] - Significance level (alpha): [.05 / .01] - Statistical power: [.80 / .90] - Test type: [t-test / ANOVA / Regression / Other] - Calculation tool: [G*Power / R / Other] - Calculation result: Minimum required N = [ ] Oversampling rate: [Accounting for ___% attrition, actual target N = ] ``` ### 13. Stopping Rule [Required] > When to stop data collection ``` Stopping rule: - [ ] Stop when target sample size is reached - [ ] Stop at specified date (Deadline: [Date]) - [ ] Stop when target power is reached (sequential analysis) - [ ] Other: [Describe] ``` --- ## D. Variables ### 14. Manipulated Variables [Required for experiments] > Independent Variables ``` Independent variable 1: [Name] Operational definition: [How it is manipulated] Levels: [Level 1 / Level 2 / ...] Independent variable 2: [If any] ``` ### 15. Measured Variables [Required] > Dependent Variables ``` Primary dependent variable: [Name] Operational definition: [How it is measured] Measurement instrument: [Scale name / Test name] Reliability and validity: [Cite reliability/validity literature] Secondary dependent variable: [If any] Covariates/Control variables: [If any] ``` ### 16. Indices [Required] > Specific scoring method for each variable ``` Variable 1 scoring: - Items: [Which items] - Scoring method: [Sum / Mean / Factor score / Other] - Reverse-scored items: [Which items need reverse scoring] - Missing data handling: [How to handle missing values] Variable 2 scoring: [Same format as above] ``` --- ## E. Analysis Plan ### 17. Statistical Models [Required] > Primary statistical analysis methods ``` Analysis for Hypothesis 1: - Statistical method: [Independent t-test / ANOVA / Regression / HLM / SEM / Other] - Detailed description: [Model specification, e.g., DV ~ IV + covariate + (1|cluster)] Analysis for Hypothesis 2: [Same format as above] ``` ### 18. Transformations [Optional] > Data transformation plan ``` Planned transformations: - [ ] No transformations - [ ] Log transformation: Applied to [which variables], trigger condition [skewness > ] - [ ] Standardization (Z-score) - [ ] Other: [Describe] ``` ### 19. Inference Criteria [Required] > Statistical inference criteria ``` Significance level: alpha = [.05 / .01 / .005] Multiple comparison correction: [Bonferroni / Holm / FDR / Not applicable] Effect size reporting: [Cohen's d / eta-squared / R² / Other] Confidence interval: [95% CI / 99% CI] One-tailed/Two-tailed test: [Two-tailed / One-tailed, with justification] ``` ### 20. Data Exclusion [Required] > Data exclusion criteria ``` Exclusion criteria: - [ ] Failed attention check (Specific criteria: [ ]) - [ ] Response time too short/long (Criteria: < [ ] minutes or > [ ] minutes) - [ ] Outliers (Definition: [> 3 SD / IQR method / Other]) - [ ] Incomplete rate > [ ]% - [ ] Other: [Describe] Post-exclusion procedures: - Report pre- and post-exclusion sample sizes - Compare characteristics of excluded vs. retained samples ``` ### 21. Exploratory Analyses [Optional] > Planned exploratory analyses ``` Exploratory analyses (not primary hypotheses, but planned): 1. [Analysis description] 2. [Analysis description] These analyses will be explicitly labeled as "exploratory" in the paper. ``` --- ## F. Other ### Ethics Review [Optional] ``` IRB review status: [Approved / Under review / Exempt / Not applicable] IRB number: [ ] Reviewing institution: [ ] ``` ### Data Availability [Optional] ``` Will data be made public: [Yes / No / Partially] Data repository: [OSF / Dataverse / Other] Timing: [After publication / After study completion / Other] ``` ### Supplementary Materials [Optional] ``` - [ ] Full questionnaire/scale - [ ] Stimulus materials - [ ] Analysis code - [ ] Power analysis report - [ ] Pilot study results ``` --- ## Pre-Submission Checklist - [ ] All [Required] items have been completed - [ ] Hypotheses are clearly stated and testable - [ ] Analysis methods correspond to hypotheses - [ ] Exclusion criteria were established before data collection - [ ] Confirmatory and exploratory analyses have been distinguished - [ ] IRB review status has been confirmed - [ ] Preregistration platform has been selected (OSF Registries recommended) > After completion, go to [OSF Registries](https://osf.io/registries) to submit the preregistration.