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Testing & Measurement (Psychology, Books): Amazon KDP category data
Amazon Books Best Sellers data for Testing & Measurement (Psychology, Books), updated Nov 2, 2026: median price $34.43, median 51 reviews, average rating 4.5 and a KDPTop opportunity score of 34/100 (highly competitive).
| Price range (middle 50%) | $22.94 – $58.45 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 6% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 2% of the parent category Psychology (3,386), one of the easier corners under it.
- At $34.43 its median price beats 91% of Books categories, leaving more margin per copy.
- Prices spread wide: the middle half runs from $22.94 to $58.45, so budget editions and premium or boxed sets sell side by side.
Top 10 Testing & Measurement best sellers
-
ACT, CBT & DBT Workbook: 3 in 1: Ultimate Guide to Overcoming Anxiety and Depression With 180+ Acceptance & Commitment, Cognitive, and Dialectical Behavioral Therapy Exercises (Inner Growth)
by Miriam Blake
- List rank#1
- Price$22.79
- Rating4.7
- Reviews564
-
Essentials of Assessing, Preventing, and Overcoming Reading Difficulties (Essentials of Psychological Assessment)
by David A. Kilpatrick
- List rank#2
- Price$25.75
- Rating4.8
- Reviews716
-
Shadow Work Journal & Workbook: Therapist Approved 5 in 1 Self Therapy Book to Explore Your Depths, Repair Inner Wounds and Integrate Your Shadows
by Olivia K. Renner
- List rank#3
- Price$23.45
- Rating4.6
- Reviews726
-
Parent Training for Disruptive Behavior: The RUBI Autism Network, Parent Workbook (Programs That Work)
by Karen Bearss
- List rank#4
- Price$46.64
- Rating4.7
- Reviews192
-
Session Notes Notebook for Therapists: Therapist Notebook Session Notes , Track and Record Your Client Records , A Therapist Journal For Helps Mental ... Client Counselling Sessions , 8.5 x 11 inch
by P.M Son Work Entries
- List rank#5
- Price$7.99
- Rating4.4
- Reviews9
-
Where to Start and What to Ask: An Assessment Handbook
by Susan Lukas
- List rank#6
- Price$23.69
- Rating4.6
- Reviews511
-
Session notes notebook for Therapist Counselors Coaches and Social worker, Customized Log Book To Record Client Problems, Progress, Plans For Psychotherapists | flower cover design
by Brian P. Ward
- List rank#7
- Price$6.98
- Rating4.3
- Reviews59
-
RBT Exam Study Guide: Full-Length Practice Tests, Secrets Prep Book for the Registered Behavior Technician Certification: [2nd Edition]
- List rank#8
- Price$23.99
- Rating4.4
- Reviews76
-
Parent Training for Disruptive Behavior: The RUBI Autism Network, Clinician Manual (Programs That Work)
by Karen Bearss
- List rank#9
- Price$68.29
- Rating4.7
- Reviews224
-
The Neuro Divergent Mind Workbook - DBT, CBT & ACT for Emotional Balance: How to Master Self-Regulation, Improve Mental Clarity, and Break Free from Emotional Overwhelm
by Brenda Emerson
- List rank#10
- Price$20.90
- Rating4.5
- Reviews54
FAQ
Is Testing & Measurement a good niche for Amazon KDP?
Its KDPTop opportunity score is 34/100, which makes it highly competitive. The median best seller has 51 reviews and sells for $34.43.
How many reviews do you need to rank in Testing & Measurement?
The median best seller has 51 reviews, and 64% of them have fewer than 100.
What do Testing & Measurement best sellers cost?
The median price is $34.43; half of the best sellers are priced between $22.94 and $58.45.
Can new books break into Testing & Measurement?
6% of the current best sellers were released in the last 90 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.