binomial sign test

• criteria for using the binomial sign test:

  • DV = produces nominal data
  • research design = repeated measures/matched pairs
  • explores a difference between each condition
• what types of data is the binomial sign test used for?

  • ordinal/internal data
  • nominal data
• what is the 's' value?

  tells us how big the difference is in before + after scores
• binomial sign test steps:

  • compare before + after ratings of each ppt
  • add an extra column called 'sign'
  • if ratings go up -> add a '+'
  • if ratings go down -> add a '-'
  • if rating doesn't change -> add a '0'
• how to find the 's' value:

  • find total of '+' signs & '-' signs
  • use the smallest value as the 's' value
• what does it mean when the observed value is greater or equal to the critical value?

  the results = NOT significant so null hypothesis accepted + alternative = rejected
• what does it mean when the observed value is less than or equal to the critical value?

  the results = significant so null hypothesis = rejected + alternative hypothesis = accepted