Richard Hackman and Gene Hackman introduced $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ which would contribute to an employee's internal motivations and other outcomes in the $1970\text{'}$s$.$

Question $2$ options:

$1)$

The Job Characteristics Model

$2)$

The Job Enhancement Plan

$3)$

The Employee Satisfaction Model

$4)$

The Employee Motivation Model