LIKERT Scale
Question from someone who found my name on-line ...

"I have a dataset for a very long survey (lots of Likert-type items)
with a very large sample of respondents (thousands of rows).  In
reviewing these data, it is clear that some respondents experienced
survey fatigue and for many of the Likert-type questions at the end,
simply repeated their responses (entering 1, 1, 1, 1, 1, 1, or 5, 5, 5,
5, 5, 5).  Is there a data step or code where you can filter out
responses for individuals on a series of variables where their responses
are identical (say for example, someone answered “1” on 15 straight
questions)?"

There are two data sets available, each with 100 observations and 15
variables that are question responses (Q1-Q15). LIKERT1 has some
observations with at least four successive values of "1". LIKERET2 has
some observations with at least four successive values of "1" and some
with at least four successive values of "2".

Write SAS code to find the "problem" observations.