This first book by German-born psychologist Hans J?rgen Eysenck's is considered a classic amongst scholars and professionals of psychology. It describes the pitfalls of psychology, and the remedies that can be applied. A strong dependence on statistics and the experimental method is emphasized as essential to good psychology.The book is divided into four sections: Intelligence Testing, Vocational Psychology, Abnormal Behaviour, and Social Attitudes. Can an intelligence test administered to an eight year old predict adult performance? Is interviewing a good way of selecting the best applicant for a job? Is there such a thing as 'normal' behaviour? Can surveys such as the Gallup poll be of assistance to psychologists? Eysenck answers these and other questions.A book not to be missed by anyone interested in psychology.