Explore illustrative format weights, example costs and reading preferences
Which reading choices are personal preferences, and which would require evidence?
This worksheet turns six inputs into an illustrative four-format mix. Its format profiles, cost rates and recall indices are authored assumptions. Compare changes in the inputs, then check the actual book, reading system, price and your own experience.
No comprehension study, health assessment, measured accessibility score, live price feed or budget-constrained optimizer. Weekly hours are recorded but do not affect any calculated metric. The 0–100 preference inputs and output indices are not measured probabilities.
The default commuter weights are audio 172, e-book 137, paperback 58 and hardback 0, totaling 367. The rounded shares are 47%, 37%, 16% and 0%. Using the assumed hourly rates gives 0.47 × $0.70 + 0.37 × $0.50 + 0.16 × $1.00 = $0.674, displayed as $0.67/hr. The assumed portability and recall indices round to 95 and 76. These are formula outputs, not observations.
Audio weight = 1.5 × hands-free preference + 0.8 × mobility − 0.4 × study. E-book weight includes mobility, screen avoidance and a budget branch: 40 points below $25, otherwise 10. Paperback includes screen avoidance, study and low mobility. Hardback adds 50 budget points above $40, otherwise 5. Audio, e-book and paperback weights have a minimum of 5; hardback has a minimum of 0.
The monthly budget changes those two branches; it does not limit purchases or monthly spending. Card prices are separate examples and are not used in the hourly calculation. Changing hours from 1 to 25 does not alter the mix, hourly cost or indices. The radar shows fixed format profiles and does not change with your inputs. Rounded audio, e-book and paperback shares leave the hardback residual; a negative residual is removed from paperback so the shares total 100%.
W3C’s EPUB accessibility specification provides discoverability metadata for features and a human-readable accessibility summary, alongside separate conformance requirements. Inspect the publication’s information and try the book in your reading system; the label “e-book” alone does not establish that it meets your needs. W3C: EPUB Accessibility 1.1
The Library of Congress National Library Service offers free audio and braille library services for eligible readers with disabilities that make print difficult to use. Its eligibility and service information supplies a practical alternative to the worksheet’s purchase-price assumptions. Library of Congress: National Library Service
For a personal comparison, try the same passage in available formats and record what you understood, how easy navigation and annotation felt, and the actual access cost. Treat that as your own small observation, not proof that one format universally improves memory or prevents eye strain.
JSON records the selected inputs and calculated scores, with sources and scope. Editing a slider marks the profile as custom; Reset restores the commuter example. The export does not prescribe a number of books or hours per format, or restore a session automatically. Print opens the browser print workflow; the worksheet does not issue a certified reading plan.
Publication metadata and conformance requirements; not validation of the assumed format scores.
Accessible audio and braille services and eligibility information.