The TestAnxietyCor dataset contains between-item correlations
  for 20 items of the Test Anxiety dataset.
data(TestAnxietyCor)TestAnxietyCor is a data.frame consisting of between-item
  correlations for 20 items.
Lack of confidence during tests.
Uneasy, upset feeling.
Thinking about grades.
Freeze up.
Thinking about getting through school.
The harder I work, the more confused I get.
Thoughts interfere with concentration.
Jittery when taking tests.
Even when prepared, get nervous.
Uneasy before getting the test back.
Tense during test.
Exams bother me.
Tense/ stomach upset.
Defeat myself during tests.
Panicky during tests.
Worry before important tests.
Think about failing.
Heart beating fast during tests.
Can<U+2019>t stop worrying.
Nervous during test, forget facts.
Bartholomew, D. J., Steele, F., & Moustaki, I. (2008). Analysis of multivariate social science data. CRC press.