The ancestor of tigers and snow leopards also branched off around 3.9 million years ago. The tiger then began to evolve into a unique species toward the end of the Pliocene epoch, about 3.2 million years ago.That makes the tiger and snow leopard âsister speciesâ, the researchers report in the journal Molecular Phylogenetics and Evolution.he ancestor of tigers and snow leopards also branched off around 3.9 million years ago. The tiger then began to evolve into a unique species toward the end of the Pliocene epoch, about 3.2 million years ago.
4. isolation - (psychiatry) a defense mechanism in which memory of an unacceptable act or impulse is separated from the emotion originally associated with it. psychiatry, psychological medicine, psychopathology-the branch of medicine dealing with the diagnosis and treatment of mental disorders.. isolation - (psychiatry) a defense mechanism in which memory of an unacceptable act or impulse is separated from the emotion originally associated with it. psychiatry, psychological medicine, psychopathology-the branch of medicine dealing with the diagnosis and treatment of mental disorders.
Abnormal psychology is a division of psychology that studies people who are  abnormal  or  atypical  compared to the members of a given society.There is evidence that some psychological disorders are more common than was previously thought.ith this definition it is necessary to be clear about how rare a trait or behavior needs to be before we class it as abnormal. For instance one may say that an individual who has an IQ below or above the average level of IQ in society is abnormal.