a step of retrieving a first set of time lapse data subsequent to transmitting a first instruction to pitch a ball according to a first difficulty factor, wherein the first set of time lapse data indicates motions of batting and a thrown ball captured by a sensor;

a step of retrieving a second set of time lapse data subsequent to transmitting a second instruction to pitch another ball according to a second difficulty factor, wherein the second set of time lapse data indicates motions of batting and a thrown other ball captured using the sensor, and the first instruction and the second instruction are distinct according to the first and second difficulty factors; and

a step of evaluating, based on the retrieved first and second sets of time lapse data according to the first and second difficulty factors, that the smaller a difference between a first difference and a second difference according to a predetermined threshold of time, a higher motion performance of a batter, wherein the higher motion performance of the batter represents a higher degree of ability of the batter in hitting a ball with accuracy, wherein

the first difference is a difference between a first elapsed time and a second elapsed time,

the second difference is a difference between a third elapsed time and a fourth elapsed time,

the first elapsed time is an elapsed time in the first set of time lapse data from a time at which a fastball was pitched to a predetermined event in a batting action made by the batter in response to the fastball where the first elapsed time was acquired under a condition where balls of a plurality of pitch types are randomly thrown without informing the batter of a pitch type,

the second elapsed time is an elapsed time in the second set of time lapse data from a point in time when a slowball was pitched to the predetermined event in a batting action made by the batter in response to the slowball where the second elapsed time was acquired under a condition where balls of a plurality of pitch types are randomly thrown without informing the batter of a pitch type,

the third elapsed time is an elapsed time in the first set of time lapse data from a point in time when the fastball was pitched to a point in time when the fastball arrives at a predetermined position near a batter's box, and

the fourth elapsed time is an elapsed time in the second set of time lapse data from a point in time when the slowball was pitched to a point in time when the slowball arrives at the predetermined position near the better's box; and

a step of transmitting the evaluated motion performance of the batter to an application configured to output the evaluated motion performance of the batter as an evaluation result.