Manipulation of the independent variables - Random asigment of participants, pre-existing groups - non-random conrol and experimental groups, No manipulation - relationships between two or more variables, Description only - No tests of causes or relationships ,

द्वारा

लीडरबोर्ड

दृश्य शैली

विकल्प

टेम्पलेट स्विच करें

ऑटो-सेव पुनःस्थापित करें: ?