Otras pruebas diagnósticas en el paciente con CE y epilepsia
Pregunta 44. Cuándo se debe practicar un estudio genético en un paciente con epilepsia?
2.3.1.1 TASK SPECIFIC SCALES
The measurement o f self-efficacy involves assessing people’s beliefs in their abilities
to produce specific levels of attainment (Bandura, 1997). Bandura (1977, 1986) advocates
using self-efficacy measures that are specific to particular domains o f functioning rather than
assessing self-efficacy as a global disposition with an omnibus test. Consequently, most self-
efficacy researchers have constructed measures which are tailored to their specific study.
Bandura also advocates using a microanalytic approach, which requires a detailed assessment
o f the level, strength, and generality o f self-efficacy beliefs. As discussed in section 2.21,
efficacy beliefs can vary along three dimensions: Level which is concerned with the
individual's expected performance attainment (Hardy et al., 2001), strength which reflects the
certainty with which the individual expects to achieve success (Hardy et al., 2001), and
generality which refers to the number o f activities or domains o f functioning in which the
individual considers him/herself efficacious. However, generality is rarely used in studies on
self-efficacy (Maddux, 1995).
Task specific self-efficacy measures are typically constructed by listing a hierarchical
series o f tasks, usually varying in difficulty, complexity, and/or stressfulness (Feltz & Chase,
1998). Participants are asked to designate (yes or no) the tasks that they believe they can
perform (efficacy level). For each task designated as ‘y es’, they rate the strength o f their
b elief ranging in 10 unit intervals from 0 (total uncertainty) to 100 (total certainty). The
measure o f self-efficacy for the activity. A measure o f efficacy level can also be obtained by
identifying the last item before participants judged themselves unable to complete the task.
The validity o f self-efficacy measures is typically inferred from how well they predict
the behaviours hypothesised in the research study, such as choice o f task, persistence, thought
patterns, and emotional responses (Feltz & Chase, 1998). However, when these scales are
used with athletes in competitive situations, they tend to have lower correlations with
measures o f performance outcome. Furthermore, one-item competitive or comparative
efficacy scales have the tendency to create ceiling effects when utilised with athletes who may
not demonstrate much diffidence (Vealey, 1986).
2.3.1.2 COLLECTIVE EFFICACY MEASURES
Only a few studies have examined collective efficacy in sport and the instruments used
have varied in their approach (Feltz & Chase, 1998). Early collective efficacy measures
utilised one-item questions to assess comparative efficacy at the team level. For example,
Spink (1990) used two questions to measure team efficacy in volleyball: “What placing do
you expect to attain in Supervolley?” (open question) and “How confident are you that your
team will attain this placing?” (scored on a 7 point Likert scale). However, as highlighted by
Feltz and Chase (1998), the first question is more related to expectancy, and the second
question is invalid. For example, an athlete who is very confident that his/her team will
achieve a poor placing, would receive a higher efficacy score than a player who is less certain
about a poor placing. In a later study designed to assess the effects of different levels o f
collective efficacy on performance o f a muscular endurance task, Hodges and Carron (1992)
assessed collective efficacy by asking “What do you think your group’s chances are of
winning?” and How confident are you of your prediction?” However, the measures suffered
the same limitation associated with Spink’s (1990) study. Furthermore, whilst the first
measured certainty o f efficacy, these are actually conceptually the same thing according to
Bandura’s (1977, 1986) definitions.
More recently, the measurement of collective efficacy has evolved in complexity.
Contemporary research has utilised two methods for measuring team efficacy, as advocated
by Bandura (1997). The first method involves aggregating team members’ appraisals o f their
own abilities for the functions they perform within the team. This is calculated by summing
all team members’ responses to various items using the stem question “How confident are you
that you can ...? ” The second method involves aggregating team members’ appraisals o f their
team’s capability as a whole using items that assess competitive task components in addition
to coordination, communication, and coordination within the team. Two different stem
questions have been adopted: “How confident are you in your team’s ability to ...? ” and
“What is your team’s confidence that they can...? ” The former has been utilised to assess
individuals’ perceptions o f the collective efficacy o f the team (Feltz & Lirgg, 1998; Magyar,
Feltz & Simpson, 2004; Myers, Feltz & Short, 2004; Myers, Payment & Feltz, 2004). The
latter has been used to assess individual’s estimates o f the team’s collective efficacy (Heuze,
Raimbault, & Fontayne, 2006; Heuze, Sarrazin, Masiero, Raimbault, & Thomas 2006;
Paskevich, Brawley, Dorsch, & Widmeyer, 1999; Short, Sullivan & Feltz, 2005).
The relative merits o f these two stem question approaches to assessing collective
efficacy has been debated (Short et al., 2005). Whether the stem question should direct a
respondent to focus on his/her individual belief in the team, or his/her perception o f the
team’s belief, is at present unclear. Indeed, Short et al., (2002a) found no differences between
the two stem questions on team efficacy ratings. Further research is needed to more fully
understand the way in which each type of stem question might influence the measurement of
Unlike the task-specific collective efficacy measures presented above, the Collective
Efficacy Questionnaire for sports (CEQS; Short et al., 2005) was developed as a
multidimensional measure o f general team sport functioning, allowing researchers to examine
team efficacy across different sport types. Furthermore, the CEQS was developed as a state
measure, with specific instructions for participants to base their responses on upcoming sport
competition. An overall team efficacy score can be computed as the average o f five
interrelated team efficacy factors: Ability, Effort, Preparation, Persistence, and Unity.