First Steps Toward Modeling ADHD Under a Dual-Task Paradigm Using a Markovian Framework for Diagnosis

Abstract

Attention-Deficit Hyperactivity Disorder (ADHD) is a common cognitive disorder afflicting many children and adults. Since most ADHD diagnostic procedures are based on subjective assessments, the goal of this study was to develop an objective assessment that takes into account performance differences between ADHD and non-ADHD individuals under a dual-task paradigm. Specifically, a model using a Markovian framework was used to determine the probability people with and without ADHD would switch between two tasks. Two studies were used, one to develop the model and one to validate the model. The values from the Ewen et al. (2012) study were used to determine the values of interest: the percentage of time spent on the each task, the probabilities remaining on each task, and the probabilities of switching between tasks. The developed multiplier value equations, which established the predicted values, were validated using the values from the Cepeda et al. (2000) study. The differences between the predicted values were all within 15% of the actual values. Overall, the study provides the initial stepping stone toward developing an objective ADHD diagnostic tool based on dual-task performance.

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References

American Psychiatric Association (1994): Diagnostic and Statistical Manual of Mental Disorders, 4th ed. Washington, DC: American Psychiatric Press.

Barkley

R. A.

(1983) Attention deficit-hyperactivity disorder. In Mash

E. J.

Barkley

R. A.

(Eds.), Treatment of Childhood Disorders (pp. 39-72). New York: Guilford Press.

Barkley

R. A.

(1997). Behavioral inhibition, sustained attention, and executive functions: Constructing a unifying theory of ADHD. Psychological Bulletin, 121, 65–94.

Cepeda

Kramer

(2000). Task switching and attention deficit hyperactivity disorder. (2000). Journal of Abnormal Child Psychology, 28(3), 213–226.

Douglas

V. I.

Peters

K. G.

(1979). Toward a clearer definition of the attentional deficit of hyperactive children. In Hale

G. A.

Lewis

(Eds.), Attention and the development of cognitive skills (pp. 173-247). New York: Plenum Press.

Ewen

J.B.

Moher

J.S.

Lakshmanan

B.M.

Ryan

Xavier

Crone

N.E.

Denckla

M.B.

Egeth

Mahone

E.M.

(2012). Multiple task interference is greater in children with ADHD. Developmental Neuropsychology, 37(2), 119-133.

Grinstead

C.M.

Snell

J.L.

(1997). Introduction to Probability -2nd Edition. Providence: American Mathematical Society.

Gualtieri

C. T.

Johnson

L. G.

(2005). ADHD: Is Objective Diagnosis Possible?. Psychiatry (Edgmont), 2(11), 44-53.

Luck

(1998). Sources of dual-task interference: Evidence from human electrophysiology. Psychological Science, 9, 223-227.

10.

van der Meere

Sergeant

(1988). Focused attention in pervasively hyperactive children. Journal of Abnormal Child Psychology, 16, 627–639.

11.

Meyer

D. E.

Karis

(1997). A computational theory of executive control processes and multiple-task performance: Part I basic mechanisms. Psychological Review, 104, 3-65.

12.

Norman

Shallice

(1986). Attention to action: Willed and automatic control of behavior. In Davidson

R. J.

Schwartz

G. E.

Shapiro

(Eds.), Consciousness and selfregulation. New York: Plenum Press.

13.

Okie

(2006). ADHD in adults. New England Journal of Medicine, 354(25), 2637-2641.

14.

Sergeant

J.A.

(2005). Modeling attention-deficit/hyperactivity disorder: a critical appraisal of the cognitive-energetic model (2005). Biological Psychiatry, 57, 1248-1255.