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  2. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    Note that if n 2 is the closest perfect square to the desired square x and d = x - n 2 is their difference, it is more convenient to express this approximation in the form of mixed fraction as . Thus, in the previous example, the square root of 15 is 4 − 1 8 . {\displaystyle 4{\tfrac {-1}{8}}.}

  3. Trachtenberg system - Wikipedia

    en.wikipedia.org/wiki/Trachtenberg_system

    Example: 42×5=210 Half of 2's neighbor, the trailing zero, is 0. Half of 4's neighbor is 1. Half of the leading zero's neighbor is 2. 43×5 = 215 Half of 3's neighbor is 0, plus 5 because 3 is odd, is 5. Half of 4's neighbor is 1. Half of the leading zero's neighbor is 2. 93×5=465 Half of 3's neighbor is 0, plus 5 because 3 is odd, is 5.

  4. Mathematical psychology - Wikipedia

    en.wikipedia.org/wiki/Mathematical_psychology

    Although psychology, as an independent subject of science, is a more recent discipline than physics, [2] the application of mathematics to psychology has been done in the hope of emulating the success of this approach in the physical sciences, which dates back to at least the seventeenth century. [3] Mathematics in psychology is used ...

  5. Irreducible fraction - Wikipedia

    en.wikipedia.org/wiki/Irreducible_fraction

    For example, ⁠ 1 / 4 ⁠, ⁠ 5 / 6 ⁠, and ⁠ −101 / 100 ⁠ are all irreducible fractions. On the other hand, ⁠ 2 / 4 ⁠ is reducible since it is equal in value to ⁠ 1 / 2 ⁠, and the numerator of ⁠ 1 / 2 ⁠ is less than the numerator of ⁠ 2 / 4 ⁠. A fraction that is reducible can be reduced by dividing both the numerator ...

  6. Weber–Fechner law - Wikipedia

    en.wikipedia.org/wiki/Weber–Fechner_law

    For example, if a stimulus is tripled in strength (i.e., 3 × 1), the corresponding perception may be two times as strong as its original value (i.e., 1 + 1). If the stimulus is again tripled in strength (i.e., 3 × 3 × 1), the corresponding perception will be three times as strong as its original value (i.e., 1 + 1 + 1). Hence, for ...

  7. Broadbent's filter model of attention - Wikipedia

    en.wikipedia.org/wiki/Broadbent's_filter_model_of...

    Broadbent was the first to describe the human attentional processing system using an information processing metaphor. [2] In this view, Broadbent proposed a so-called "early selection" view of attention, such that humans process information with limited capacity and select information to be processed early.

  8. Three mountain problem - Wikipedia

    en.wikipedia.org/wiki/Three_mountain_problem

    The child who is seated at a table where a model of three mountains is presented in front. The mountains were of different sizes, and they had different identifiers (one mountain had snow; one had a red cross on top; one had a hut on top). [3] The child was allowed to do a 360 surveillance of the model.

  9. Problem solving - Wikipedia

    en.wikipedia.org/wiki/Problem_solving

    Problem solving in psychology refers to the process of finding solutions to problems encountered in life. [5] Solutions to these problems are usually situation- or context-specific. The process starts with problem finding and problem shaping, in which the problem is discovered and simplified. The next step is to generate possible solutions and ...