Pps in early adulthood (16-45) will have a higher mean number of minutes sleep over one week than those in middle adult hood (46-65).
Why is it a directional hypothesis
Previous research shows older age groups report poorer sleep quality across a variety of measures including hours of sleep (Floyd et al)
Extraneous variable considered
Clock change. Losing 1 hour sleep will impact all pps not dependant on age.
Controlling extraneous variable
Clock change- avoided it by conducting research 2 weeks after so biological rhythms could readjust.
Experimental design, why?
Independent groups, needed to compare sleepover 2 separate age groups and pps cannot be in both groups
Inferential statistic test
Mann Whitney U: Testing for difference between 2 Independent groups ( participants either in early or middle adulthood) and the level of measurement ( average sleep over a week) was ordinal
2 improvements
Internal validity could be improved to improve the accuracy of sleep data, for example by using an. app linked to a smart watch
Use a largersample and different sampling method for example stratified sample, to make it more representative
