What is meant by the term "intelligence" and, once de- fined, how do we go about achieving a valid measurement of this faculty? This classic textbook, originally published in 1979, and now reissued with a new preface by Sybil Eysenck, incorporates a broad range of findings and reanalyzes much of the existing literature in this area. In The Structure and Measurement of Intelligence, Hans Eysenck draws on methods for determining the effect of genetics and environment on the development of intelligence and examines the validity of the term as defined in relation to internal as well as external criteria. He tests a number of hypotheses on intelligence against empirical research findings and considers various criticisms in detail. The significance of intelligence and its measurement in society are explored in depth. Eysenck greatly expands upon such questions as: Does IQ measure intelligence? How valid is the nature versus nurture argument? and, How might socioeconomic status influence one's intelligence? Designed primarily for students and scholars in psychology and education, this text will make thought-provoking reading for all concerned with the development and measurement of intelligence in the individual.

Kayla and Mishalla, two genetically engineered enslaved non-human (GENs), fall in love with higher-status boys, discover deep secrets about the creation of GENs, and in the process find out what it means to be human. Enslaved by their genetics. Oppressed by their creators. Fighting for their humanity. On rugged planet Loka, life for best friends Kayla and Mishalla is arduous at best. They are GENs, Genetically Engineered Non-humans, and in their strict caste system, GENs are at the bottom rung of society. GENs are gestated in a tank and sent to work as slaves as soon as they reach age fifteen. When Kayla is Assigned to care for Zul Manel, the patriarch of a trueborn family, she finds secrets and surprises--not least of which is her budding friendship with Zul's handsome great-grandson. Meanwhile, the children that Mishalla is Assigned to care for are being stolen in the middle of the night, and a strange lowborn boy is hanging around nearby. After weeks of toiling in their Assignments, mystifying circumstances enable Kayla and Mishalla to reunite. Together with the boys, they hatch a plan to save the disappearing children. Yet can GENs really trust humans? Both girls must put their lives and hearts at risk to crack open a sinister conspiracy, revealing secrets no one is ready to face. The first in a trilogy, Tankborn is a page-turning sci-fi thriller that will leave readers scrambling for the sequel! Check out the other titles in this series: TANKBORN * AWAKENING * REBELLION