Alyssa Rmd

Attitude Scales - Descriptives

#Author: Alyssa Lim
#Title: PSYC3361 Verification Report
#Date: 25/06/2024

#load packages
library(tidyverse)

## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ──
## ✔ dplyr     1.1.4     ✔ readr     2.1.5
## ✔ forcats   1.0.0     ✔ stringr   1.5.1
## ✔ ggplot2   3.5.1     ✔ tibble    3.2.1
## ✔ lubridate 1.9.3     ✔ tidyr     1.3.1
## ✔ purrr     1.0.2     
## ── Conflicts ────────────────────────────────────────── tidyverse_conflicts() ──
## ✖ dplyr::filter() masks stats::filter()
## ✖ dplyr::lag()    masks stats::lag()
## ℹ Use the conflicted package (<http://conflicted.r-lib.org/>) to force all conflicts to become errors

#load data
mainstudy <- read_csv("beliefsuperiority_all.csv")

## New names:
## Rows: 1454 Columns: 65
## ── Column specification
## ──────────────────────────────────────────────────────── Delimiter: "," chr
## (2): Q58, rid dbl (62): Q62...1, immigration_a, immigration_b, abortion_a,
## abortion_b, vot... num (1): Q62...49
## ℹ Use `spec()` to retrieve the full column specification for this data. ℹ
## Specify the column types or set `show_col_types = FALSE` to quiet this message.
## • `Q62` -> `Q62...1`
## • `Q62` -> `Q62...49`

# set up data -------------------------------------------------------------


#filter non-consent rows and failed attention checks
mainstudy <- mainstudy %>%
  filter(Q62...1 == 1) %>%
  filter (AC_a == 3) %>%
  filter (AC_b == 5) %>% 
  select(-starts_with("AC")) #remove attention check items



# calculate mean and SD for issue-relevant attitudes ----------------------


#transform 4-pt attitude scales to 5-pt
#4-pt scales: vote (belief), torture (belief), affirmation (belief)
#(5-1) * (x-1) / (4-1) + 1
mainstudy$vote_a = recode(
  mainstudy$vote_a,
  '2=1; 3=2.3333; 4=3.6667; 5=5'
  )

## Warning: Unreplaced values treated as NA as `.x` is not compatible.
## Please specify replacements exhaustively or supply `.default`.

mainstudy$torture_a = recode(
  mainstudy$torture_a, 
  '2=1; 3=2.3333; 4=3.6667; 5=5'
  )

## Warning: Unreplaced values treated as NA as `.x` is not compatible.
## Please specify replacements exhaustively or supply `.default`.

mainstudy$affirmaction_a = recode(
  mainstudy$affirmaction_a, 
  '2=1; 3=2.3333; 4=3.6667; 5=5'
  )

## Warning: Unreplaced values treated as NA as `.x` is not compatible.
## Please specify replacements exhaustively or supply `.default`.

#Convert recoded variables to numeric
#This was added later, for some reason it worked without this part in the script
#May or may not need this section
mainstudy$vote_a <- as.numeric(mainstudy$vote_a)
mainstudy$torture_a <- as.numeric(mainstudy$torture_a)
mainstudy$affirmaction_a <- as.numeric(mainstudy$affirmaction_a)


#Calculate an average attitude score per participant
attitude <- mainstudy %>% 
  select(ends_with('_a')) %>% 
  mutate(mean_attitude = rowMeans(select(., ends_with('_a')), na.rm = TRUE))  


#Summarise the mean attitude score for the sample
summary <- attitude %>%
  summarise(
    m_attitude = mean(mean_attitude),
    stdev_attitude = sd(mean_attitude)
  )