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2. Hanayama - Wikipedia

   en.wikipedia.org/wiki/Hanayama

   Hanayama is a Japanese toy company founded in 1933. [1] They are best known for their series of metal disassembly puzzles , " Huzzle [ jp ] " (also known as "Cast Puzzle"), which include reproductions of older designs, and new puzzles by other inventors such as Oskar van Deventer and Akio Yamamoto . [ 2 ]

3. Degree of difficulty - Wikipedia

   en.wikipedia.org/wiki/Degree_of_difficulty

   The FIG gives difficulty points for number of somersaults, number of body twists and the body position in somersaults (piked or straight). The total sum of the individual elements forms the difficulty score component of competitor's final score: [14] [15] Each 1/4 rotation of a somersault = 0.1 DD; Completed 360° somersault (bonus) = 0.1 DD

4. Polytomous Rasch model - Wikipedia

   en.wikipedia.org/wiki/Polytomous_Rasch_model

   where is the difficulty of item i and is the kth threshold location of the rating scale which is in common to all the items. m is the maximum score and is identical for all the items. τ 0 {\displaystyle \tau _{0}} is chosen for computational convenience.

5. Likert scale - Wikipedia

   en.wikipedia.org/wiki/Likert_scale

   A Likert scale (/ ˈ l ɪ k ər t / LIK-ərt, [1] [note 1]) is a psychometric scale named after its inventor, American social psychologist Rensis Likert, [2] which is commonly used in research questionnaires.

6. Rating scale - Wikipedia

   en.wikipedia.org/wiki/Rating_scale

   A rating scale is a set of categories designed to obtain information about a quantitative or a qualitative attribute. In the social sciences , particularly psychology , common examples are the Likert response scale and 0-10 rating scales, where a person selects the number that reflecting the perceived quality of a product .

7. Code of Points (gymnastics) - Wikipedia

   en.wikipedia.org/wiki/Code_of_Points_(gymnastics)

   In 2006, the Code of Points and the entire gymnastics scoring system were completely overhauled. The change stemmed from the judging controversy at 2004 Olympics in Athens, which brought the reliability and objectivity of the scoring system into question, and arguments that execution had been sacrificed for difficulty in artistic gymnastics.

8. Grade (climbing) - Wikipedia

   en.wikipedia.org/wiki/Grade_(climbing)

   Brazilian technical scale. Climbing in the carioca dates from 1912 and the ascent of the "Dedo de Deus" (God's Finger) in the Serra dos Órgãos. Brazilian climbing has two grades, with the first being a numerical grade from 1 (easiest) to 8 (hardest) and giving the "overall" level of difficulty (akin to the UIAA Scale of Overall Difficulty ...

9. Trail difficulty rating system - Wikipedia

   en.wikipedia.org/wiki/Trail_difficulty_rating_system

   A trail difficulty rating system, also known as walking track grading system, walk gradings or trail grades, is a classification system for trails or walking paths based on their relative technical and physical difficulty. [1] A trail difficulty rating system informs visitors about the attributes of walking tracks and helps visitors ...