There are several different kinds of tests that employers use for predicting how well an employee will perform, how reliable a candidate may be, or as a way to compare between candidates to make final hiring decision. But is it possible to use this kind of testing to predict leadership abilities? Many of these tests such as the Wonderlic Personnel test evaluate for quick thinking, and logical thinking, quick decision making skills as well as comprehension of language and numeracy. All of these are important factors of intelligence that have shown to be a very valid indicator of future success. However, some elements of intelligence, like social intelligence and being able to handle situations in a diplomatic way is not really possible to be caught by a test. I also think that forward thinking, as in strategizing, is not really found well by these kinds of tests. I believe (but would obviously need to test in order to prove this) that there are plenty of excellent managers who are able to think strategically to ensure long term success of their company, reviewing multiple factors in the decisions they make and even in the types of long term goals that they set for themselves, their team and the company, but may not be very quick thinking when it comes to test taking and may not even have very good math skills or other kind of skills that impact their success on this kind of test.
This question has been examined by researchers. In fact, Hannah, Balthazard, Waldman Jennings and Thatcher examined leaders self concepts and how their ability to adapt and deal with situations of great complexity and their actual EEG brain patterns when given complex strategizing tasks are related. They discuss that “findings provide a deeper understanding of the latent and dynamic mechanisms that underpin leaders’ self-complexity and their adaptability” (2013)
In the following youtube video Dr Daniel Goleman discusses how social intelligence (how you read people, what you take in and ‘hear’ how well you react etc) has been shown to be the most important indicator of good leadership. So it would seem that intelligence testing wouldn’t really be able to provide the best prediction of good leadership skills, because the intelligence they test for do not include social and emotional intelligence.
references
Hannah, S. T., Balthazard, P. A., Waldman, D. A., Jennings, P. L., & Thatcher, R. W. (2013). The psychological and neurological bases of leader self-complexity and effects on adaptive decision-making. Journal of Applied Psychology, 98(3), 393-411. doi:http://dx.doi.org/10.1037/a0032257