KeyStudy2:Martens-The competitive state anxiety inventory
There have been lots of tests to measure state and trait anxiety however these are all uni dimensional as they only measure one thing therefore martens created a multi -dimensional model which relates all types of anxiety.
Somatic anxiety: has an inverted u shape relationship with performance just like arrousal
Self-Confidence:Has a positive correlation with performance
Cognitive anxiety:Has a negative relationship with performance.
Martens CSAI measures all sorts of state anxiety(somatic,cognitve and self confidence)