The challenge of determining the existence of a g is the ...

[kamilo84]

The challenge of determining the existence of a g is
 
  the current research focus on assessment rather than on intelligence.
  adults' resistance to taking tests.
  the lack of pure measures of intelligence.
  the expense of conducting extensive, cross-sequential research.

Question 2

Schaie's case studies of adult intelligence indicated that
 
  retirement signals a decrease in performance.
  intelligence is stable throughout adulthood.
  intellectual growth is affected by the unique experiences of adult life.
  women uniformly outperform men.

[AaaA]

Answer to Question 1

the lack of pure measures of intelligence.

Answer to Question 2

intellectual growth is affected by the unique experiences of adult life.

[kamilo84]

Thanks for the timely response, appreciate it

[Kedrick2014]

YES! Correct, THANKS for helping me on my review