Professor Rashad is interested in studying cognitive development. He collects and compares data from a group of 6-year-olds and a group of 10-year-olds. Five years later, he compares these two groups to each other again as well as to their own performance in the study five years ago. Professor Grant is employing a design in his research.

Professor Grant is employing A cross-sequential design in his research.

Explanation:

A cross-sequential design is a method used in research that combines a dual study of  a group of people having the same characteristics such as age, gender, location, education,and  researching how their lives are affected in short term and over a long period of time period usually through out their years. ie it  is a research method that combines  both a longitudinal design and a cross-sectional design.

Combining these study has helped  correct errors and unnecessary developmental assumptions  that might be found in either of these designs alone. Also, while longitudinal can be can be expensive and  time consuming. The  dual  design helps to reduce such problems.

Professor Rashad in this regard is employing a A cross-sequential design in his research.

the language of nature was a manifestation from god as he said "let there be light" and there was light the world began to assume visible, comprehensible form.

what ever we know now think of the old vision of creation we can be sure that with out the speaking of word -without language- we would have no science today with its striking power to illuminate the world.