01290nas a2200217   4500000000100000008004100001260007600042653002000118653001600138653001100154653001600165100002700181700002700208700002500235245004900260300001200309490000600321520071700327022001401044020001401058       1995                            d  c07/1995bSociedad Española para el Estudio de la Ansiedad y el Estrés10aTask difficulty10aMental load10aStress10aTask design1 aSusana Rubio Valdehita1 aJesús Martín García1 aEva Mª Díaz Ramiro00aMental load and stress: Two related concepts  a131-1390 v13 aThe confusion between mental load and stress originates in the poor definition of both concepts. These two concepts refer to the discrepancy between environmental demands and the availability of resources to meet them. In mental load theories resources and demands refer only to the processing needed to perform a particular task. However, in stress theories the definition of both demands and resources refer also to the physical, psychosocial and organizational aspects of work environment. In the present study, high and positive correlation coefficients between mental load and stress were found, using subjetive procedures. Similarly, we found significant effects of the task difficulty on the stress level.  a1134-7937  a2174-0437