Preadolescence is a stage of human development following early childhood and preceding adolescence. It commonly ends with the beginning of puberty but may also be defined as ending with the start of the teenage years. Preadolescence is commonly defined as ages 9-12 ending with the major onset of puberty. It may also be defined as simply the 2-year period before the major onset of puberty. Preadolescence can bring its own challenges and anxieties. Terminology
Other slang and terminology used to refer to the preadolescent stage include tween or tweener, as a combination of the words "teen" and "between. "While known as preadolescent in psychology, the terms preteen, preteenager, or tween are common in everyday use. A preteen or preteenager is a person 12 and under. Generally, the term is restricted to those close to reaching age 13, especially ages 9 to 12. Tween is an American neologism and marketing term for preteen, which is a blend of between and teen. People within this age range are variously described as tweens, preadolescents, tweenies, preteens, pubescents, junior highschoolers, middle schoolers, or tweenagers. Prepubescence, puberty, and age range
Being prepubescent is not the same thing as being preadolescent. Instead, prepubescent (and sometimes child) is a term for boys and girls who have not developed secondary sex characteristics, while preadolescent is generally defined as those ranging from age 9 to 12 years.
Adequate determinism
Adequate determinism is the idea, because of quantum decoherence, that quantum indeterminacy can be ignored for most macroscopic events. Random quantum events "average out" in the limit of large numbers of particles (where the laws of quantum mechanics asymptotically approach the laws of classical mechanics). Stephen Hawking explains a similar idea: he says that the microscopic world of quantum mechanics is one of determined probabilities. That is, quantum effects rarely alter the predictions of classical mechanics, which are quite accurate (albeit still not perfectly certain) at larger scales. Something as large as an animal cell, then, would be "adequately determined" (even in light of quantum indeterminacy). Many-worlds
The many-worlds interpretation accepts the linear causal sets of sequential events with adequate consistency yet also suggests constant forking of causal chains creating "multiple universes" to account for multiple outcomes from single events. Meaning the causal set of events leading to the present are all valid yet appear as a singular linear time stream within a much broader unseen conic probability field of other outcomes that "split off" from the locally observed timeline. Under this model causal sets are still "consistent" yet not exclusive to singular iterated outcomes. The interpretation sidesteps the exclusive retrospective causal chain problem of "could not have done otherwise" by suggesting "the other outcome does exist" in a set of parallel universe time streams that split off when the action occurred.