This study sought to reveal the relationship between academic stress, achievement motivation, and academic compatibility among doctoral students, detecting the level of each of these variables among the sample, finding out the differences in academic compatibility according to the level of academic Stress and achievement motivation. The descriptive correlational method was used. To obtain a reliable data, (100) students with (47) male and (53) female students were selected stratified randomization selected from the Faculty of Social Sciences and Humanities at El-Oued University. The study tools were applied, which are; Academic Stress scale (prepared by the researcher), achievement motivation scale (prepared by the researcher), academic compatibility scale (prepared by the researcher). The validity of the scale was confirmed in the exploratory study, Data were processed using statistical methods represented in (percentage, K², Pearson correlation coefficient, multiple regression coefficient), through the program of the Statistical Package for Social Sciences (SPSS). The study reached the following results: - The level of academic stress among the study sample is high. - The level of achievement motivation among the study sample is high. - The level of academic compatibility among the study sample is high. - The two independent variables (academic Stress and achievement motivation) explain (35%) of the change in academic compatibility. - Achievement motivation contributes to explaining academic compatibility with a rate of (82%), while academic Stress explains it with a very small percentage estimated at (3%). - There are no statistically significant differences in the academic compatibility of the study sample due to the level of academic stress. - There are statistically significant differences in the academic compatibility among the study sample due to the level of achievement motivation.

Academic Stress, Achievement Motivation, Academic compatibility.