additivity
Parts sum together
Additivity is the property of combining by simple addition.
In science and statistics, a system shows additivity when the whole equals the sum of its parts—the combined effect of two factors is exactly what you'd predict by adding their individual effects.
The model assumes additivity, meaning no interaction between variables.
When additivity fails, factors interact in ways that addition alone can't capture.
Collected mass over time
- aggregateCombined sum total
- sumAddition's result
- totalComplete sum
- buildupGradual accumulation over time
amassment · tally · accrual · running total · compounding · pileup · stockpile · collection
Adding to find total
- addendsNumbers to combine
- plusSign of increase
- commutativeOrder of terms irrelevant
- associativeConnecting by relationship
linear · arithmetic · algebraic · superposition · linearity · closure
Proceeding by degrees
- gradualDeveloping slowly over time
- sequentialOccurring in succession
- piecemealIn separate stages
- bit-by-bitIn gradual increments
progressive · iterative · successive · step-by-step · layering · stacking · building up · phased
Relationship between amount and effect
- stoichiometryQuantitative chemical reaction analysis
- concentrationSustained single-minded attention
- mixtureCombined but unbonded substances
- pharmacologyStudy of drug actions
toxicology · drug interaction · noninteractive · dosimetry · bioaccumulation
Reciprocal action between parties
- synergyCombined effect exceeding components
- antagonismActive opposition or hostility
- potentiationIncreased effect through interaction
- enhancementIncrease in quality
accumulation
Collected mass over time
buildup · amassment · tally · accrual · running total · compounding · pileup · stockpile · collection · assemblage
summation
Adding to find total
- addendsNumbers to combine
- plusSign of increase
- commutativeOrder of terms irrelevant
associative · linear · arithmetic · algebraic · superposition · linearity · closure
stepwise
Proceeding by degrees
- gradualDeveloping slowly over time
- sequentialOccurring in succession
- piecemealIn separate stages
bit-by-bit · progressive · iterative · successive · step-by-step · layering · stacking · building up · phased · marginal
dose-response
Relationship between amount and effect
- stoichiometryQuantitative chemical reaction analysis
- concentrationSustained single-minded attention
- mixtureCombined but unbonded substances
pharmacology · toxicology · drug interaction · noninteractive · dosimetry · bioaccumulation
interaction
Reciprocal action between parties
- synergyCombined effect exceeding components
- antagonismActive opposition or hostility
- potentiationIncreased effect through interaction
additivityinteraction
Reciprocal action between parties
synergy · antagonism · potentiation · inhibition · moderation
additivityemergence
Coming into existence
nonlinearity · holism · synergism · complexity · gestalt
add, addition, added, adding, additional, additions, additive, additionally, addendum