I'm conducting a research study with an online survey. The survey has 64 questions and is consisted of 3 different measurement scales. One of the 3 measurement scales is my original scale, and the project is to validate this newly established measurement scale. The other two scales of the three, A and B. A gives a true/false score according to the original study. B scale provides numeric scores based on the original research facility's scoring program. It is my first time to design a new measurement scale, so I am trying to figure out which test I need to use to analyze my data. The subject group is not separated, and questions are answered in 5-point likert scale. Some data analysis that are currently on my list are

-Basic mean, max and min scores

-Frequency

-Regression test

-Internal consistency

Suggestions for any additions or deductions?  Please also leave comments if any other information is needed!

Thanks in advance for your help!!