Statistics
SUS and NASA TLX
In this page we provide some statistics concerning the SUS and the NASA TLX scores distributions and how they correlate.
Descriptive statistics
In this document we present the descriptive statistics for the SUS and NASA TLX scores for the original and proposed BPT concrete syntaxes
SUSTLXDescriptiveStats.pdfNormality tests
In this document we present the normality tests for the SUS and NASA TLX scores. We use both the Kolmogorov-Smirnov test with Lilliefors correction and the Shapiro Wilk test. The results of both tests suggest normality in the distribution of SUS and TLX scores.
SUSTLXNormalityTests.pdfCorrelation test
A Pearson product-moment correlation coefficient was computed to assess the relationship between the SUS score and the NASA TLX score. There was a negative correlation between SUS and NASA TLX scores, r = -.818, n = 25, p<001.
SUSTLXCorrelation.pdfA scatterplot summarises the results.
SUSTLXScatterPlot.pdfOverall, there was a strong negative correlation between the SUS and NASA TLX scores. Increases in SUS were correlated with decreases in NASA TLX.