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Concurrent validity:

Multiple Sclerosis: (Ovacik et al., 2022)

• Excellent correlations between MMDT Placing-Dominant, Placing-Non-dominant, & Two-Hand Turning and Placing tests with Nine Hole Peg Test (NHPT) Dominant (r¡¯s = 0.959, 0.843, and 0.687, respectively, all p < 0.001)
• Excellent correlations between MMDT Placing-Dominant, Placing-Non-dominant, & Two-Hand Turning and Placing tests with NHPT Non-dominant (r¡¯s = 0.885, 0.972, and 0.750, respectively, all p < 0.001)

Convergent validity:

Multiple Sclerosis: (Ovacik et al., 2022)

• Excellent correlations between MMDT Placing-Dominant, Placing-Non-dominant, & Two-Hand Turning and Placing tests and the Expanded Disability Scale (EDSS) (r¡¯s= 0.740, 0.655, and 0.603, respectively, all p < 0.001)
• Adequate correlations between MMDT Placing-Dominant subtest and other variables:
  • Grip strength (Dominant): (r = -0.325, p = 0.004)
  • Tip pinch (Dominant): (r = -0.380, p = 0.001)
  • ABILHAND: (r = -0.474, p = 0.001)
  • Disease duration (year): (r = 0.468, p < 0.001)
• Adequate correlations between MMDT Placing-Non-dominant subtest and other variables:
  • ABILHAND: (r = -0.474, p = 0.001)
  • Disease duration (year): (r = 0.438, p < 0.001)
• Adequate correlations between MMDT Two-hand Turning and Placing  subtest and other variables:
  • ABILHAND: (r = -0.384, p = 0.009)
  • Disease duration (year): (r = 0.571, p < 0.001)
• Poor correlations between MMDT Placing-Dominant subtest and other variables:
  • Lateral pinch (Dominant): (r = -0.251, p = 0.036)
  • Palmar pinch (Dominant): (r = -0.286, p = 0.016)
• Poor correlation between MMDT Placing-Non-dominant subtest and the Tip pinch (Dominant): (r = -0.270, p = 0.024)
• Poor correlations between MMDT Two-hand Turning and Placing subtest and the Palmar pinch (r = -0.244, p = 0.045)

Discriminant validity:

Multiple Sclerosis: (Ovacik et al., 2022)

• Significant ability of scores on the Placing-Dominant, Placing Non-dominant, and Two-hand Turning and Placing subtests of the MMDT to discriminate between persons with MS and healthy controls (p < 0.001 for all; see Normative Data for means and standard deviations for each group)

Older Adults and Geriatric Care: (Desrosiers et al., 1997; n = 247, mean age (SD) = 74.3 (7.2) years, age range = 63-91 years, majority (about 90%) French speaking)

• Reference values for the MMDT by gender and age group (Mean (SD) in seconds):

Women (n = 114)

Men (n = 133)

Older Adults and Geriatric Care: (Desrosiers et al., 1997, n = 35, mean test-retest interval = 7 days)

• Acceptable test-retest reliability for all MMDT subtests:
  • Placing test right hand (ICC = 0.88)
  • Placing test left hand (ICC = 0.83)
  • Turning test (ICC = 0.79)

Concurrent validity:

Older Adults and Geriatric Care: (Desrosiers et al., 1997; n = 247)

• Excellent correlations between the subtests of the MMDT and the Minnesota Rate of Manipulation Test (MRMT), the Box and Block Test (BBT), and the Purdue Pegboard (PP)
  • MMDT and MRMT: r = 0.85 to 0.95
  • MMDT and BBT: r = 0.63 to 0.67
  • MMDT and PP: r = 0.63 to 0.67

Healthy Adults: (Wang et al., 2018; n = 66, mean age (SD) = 32 (13) years, age range = 21-64 years, female = 67%, 89% reported as right-hand dominant)

Mean (SD) of Time (seconds) to Complete an MMDT trial

Healthy Adults: (Wang et al., 2018; n = 32)

• Acceptable test-retest reliability for all MMDT subtests:
  • 20 disks placing test (ICC = 0.86)
  • 20 disks turning test (ICC = 0.87)
  • 60 disks placing test (ICC = 0.88)
  • 60 disks turning test (ICC = 0.86)

Concurrent validity:

Healthy Adults: (Wang et al., 2018)

• Excellent correlation between MMDT Placing Test and WorkAbility Rate of Manipulation Test (WRMT) Placing Test (r = 0.81, p < 0.01 (2-tailed))
• Adequate correlations between MMDT Turning Test and WRMT turning tests (all p < 0.01 (2-tailed)):
  • WRMT Turning test (both hands): r = 0.51
  • WRMT Turning test (right hand): r = 0.44
  • WRMT Turning test (left hand): r = 0.51
  • WRMT Turning test (R + L hand/2): r = 0.52