Psychokinesis

Psychokinesis (念力 (サイコキネシス) ) (PK) in the Toaru Majutsu no Index universe is both one of two criterias that esper powers are grouped into, the other being ESP or Extrasensory perception, and an esper power itself.

Basically, PK involves influence of an object external to the user. Powers that allows one to physically affect an object are classified in PK, like Telekinesis.

Criteria
As explained by Tsukuyomi Komoe, PK has a higher precedence in classification of esper powers than ESP, especially when an esper power sits on both sides of the boundary between ESP and PK.

Esper power
As an esper power, Psychokinesis has various applications. Regarding the Columbus’ Egg test, espers specializing in Psychokinesis could keep the egg from falling when they worked to the point of the blood vessels in their brain almost bursting, though it's said to be an extremely difficult challenge because the egg would break if the Psychokinesis was too powerful.

A Level 5 version of the ability is used by the Qiong Qi Coffin against Accelerator, which is able to easily dissipate the #1's wind attack. It can also create a dark round mass of unknown effect. Also, Misaka Mikoto, after witnessing ITEM defeating STUDY's Powered Suits controlled by Janie's Diffusion Ghost, initially theorized the machines were moved by a Psychokinesist of at least Level 5-tier, due to the large number of Powered Suits controlled.

Known Subtypes

 * Micro Structure (微細構築 (ミクロステラクチャー) ): It allows the user to perform Psychokinesis on the level of particles to alter the behavior of molecules.

Known Psychokinesists

 * Qiong Qi - Level 5
 * Kukimoto Hibiki - Level 0 Micro Structure