The summary function returns a data frame that provides additional information. It contains 'Item' and 'Group' columns similiar to the results data frame as well as a column 'low' corresponding to the sum of levels below neutral, a column 'high' corresponding to the sum of levels above neutral, and columns 'mean' and 'sd' corresponding to the mean and standard deviation, respectively, of the results. The numeric values are determined by as.numeric which will use the values of the factors.

# S3 method for likert
summary(object, center = (object$nlevels - 1)/2 + 1, ordered = TRUE, ...)

Arguments

object

the likert class to summarize.

center

specifies which level should be treated as the center. For example, center = 3 would use the third level as the center whereas center = 3.5 would indicate no specific level is the center but <= 3 are low levels and >= 4 are high levels (i.e. used for forced choice items or those without a neutral option).

ordered

whether the results should be ordered. Currently unsupported for grouped analysis.

...

currently unused.