APA Write-Up for 2x2 Within-Groups Factorial ANOVA

Description

Generates an APA-style paragraph for a two-way within-groups (repeated measures) ANOVA where both factors are measured within subjects.

Usage

apa_2x2_wg_factorial_writeup(
  wg_factorial_results_list,
  dv_name,
  factor_a_name,
  factor_b_name,
  factor_a_labels,
  factor_b_labels,
  hypothesis = NULL,
  alpha = 0.05,
  posthoc_test = "LSD"
)

Arguments

wg_factorial_results_list	Output from within-groups factorial ANOVA containing: Interaction List with F, p_value, df_effect, df_error, mse MainEffect_A List for factor A MainEffect_B List for factor B CellDescriptives Data frame with factor_a, factor_b, mean, sd MarginalMeans_A Data frame with level, mean, se MarginalMeans_B Data frame with level, mean, se
dv_name	Character. Descriptive name for DV (e.g., "performance").
factor_a_name	Character. Name of factor A (e.g., "task type").
factor_b_name	Character. Name of factor B (e.g., "difficulty").
factor_a_labels	Character vector of length 2. Labels for factor A.
factor_b_labels	Character vector of length 2. Labels for factor B.
hypothesis	List with hypothesis details: interaction_rh Full RH statement for interaction. simple_effects List describing expected pattern at each level
alpha	Significance level. Default 0.05.
posthoc_test	Character. Name of follow-up test. Default "LSD".

Value

A character string with APA write-up.

Examples

library("psych350lab")

writeup <- apa_2x2_wg_factorial_writeup(
  results,
  dv_name = "performance",
  factor_a_name = "task presentation",
  factor_b_name = "task difficulty",
  factor_a_labels = c("computer", "paper"),
  factor_b_labels = c("easy", "hard"),
  hypothesis = list(
    interaction_rh = paste0("students will perform better on ",
      "hard tasks on computer but better on easy tasks on paper"),
    simple_effects = list(
      list(at_a_level = "computer", direction = "b2_higher"),  # hard > easy on computer
      list(at_a_level = "paper", direction = "b1_higher")      # easy > hard on paper
    )
  )
)