variable interval

USAGE SUMMARY

The phrase "variable interval" is correct and usable in written English.
It is typically used in contexts related to psychology, behaviorism, or scheduling, referring to a reinforcement schedule where rewards are given after varying amounts of time. Example: "In operant conditioning, a variable interval schedule can lead to a high rate of response as the subject never knows when the next reward will come."

✓ Grammatically correct

Science

News & Media

Human-verified examples from authoritative sources

Exact Expressions

55 human-written examples

Psychology students are getting a little meta about their major as members of "Oh No! Facebook Is Positively Reinforcing on a Variable Interval Schedule!" Such are the hints that Facebook is about not only sharing last night's photos but also connecting organically to the classroom.

The New York Times

Definition: Variable interval reward schedules provide a reward after a roughly consistent amount of time.

TechCrunch

One component presented reinforcement according to a variable interval 45-s schedule and the second presented reinforcement according to a variable interval 180-s schedule.

Behavioural Processes

Meanwhile, a fast frequency tracking algorithm based on variable step size and variable interval was designed.

Measurement

They were trained to press two levers under a variable interval (VI-20, 1 35 s).

European Journal of Pharmacology

This maneuver is repeated regularly with a variable interval, depending on the calculated volume status.

Intensive Care Medicine Experimental

Human-verified similar examples from authoritative sources

Similar Expressions

5 human-written examples

With a variable-interval schedule, reinforcement is given after a variable amount of time.

Encyclopedia Britannica

The effects of terminal-link fixed-interval and variable-interval schedules on responding under concurrent-chained schedules.

Behavioural Processes

In Experiment 1A, key pecking was maintained on a multiple variable-interval (VI) VI schedule in the Training phase.

Behavioural Processes

The fluid elements age distributions, needed in the surface renewal model, were determined using the variable-interval time-averaging (VITA) method.

Chemical Engineering Science

Across different alternating discriminative stimuli, variable-interval schedules arranged leaner (30 per hour) and richer (120 per hour) rates of food reinforcement.

Behavioural Processes

Expert writing Tips

Best practice

When describing schedules in experiments or behavioral studies, use "variable interval" to accurately represent that reinforcement is provided after inconsistent time periods.

Common error

Avoid using "variable interval" when you mean a "fixed interval". A "fixed interval" schedule provides reinforcement after a consistent amount of time, whereas a "variable interval" schedule uses varying time periods.

Linguistic Context

The phrase "variable interval" functions as a noun phrase, often acting as an adjective modifying another noun (e.g., "variable interval schedule"). Ludwig confirms its typical usage in specific contexts.

Expression frequency: Very common

Frequent in

Science

80%

News & Media

10%

Formal & Business

5%

Less common in

Encyclopedias

2%

Wiki

2%

Reference

1%

Ludwig's WRAP-UP

The phrase "variable interval" is grammatically correct and predominantly used in scientific and technical fields to denote a time-related condition or parameter with varying durations. Ludwig confirms its frequent usage in describing reinforcement schedules in psychology and behavioral studies. Common contexts include science, news, and business, and it is important to distinguish it from "fixed interval". Related phrases include "random period" and "irregular duration". Overall, the phrase is well-established and serves a precise communicative purpose in describing time-based variability.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

random period

Changes "interval" to "period", emphasizing a time span, while "random" suggests unpredictability.

irregular duration

Replaces "variable" with "irregular" and "interval" with "duration", highlighting the inconsistency of the time span.

fluctuating time

Uses "fluctuating" to describe the changing nature of "time", implying variation.

unpredictable spacing

Focuses on the "spacing" or arrangement of events with "unpredictable" replacing "variable".

changing gap

Emphasizes the "gap" between occurrences and its changing nature.

varying timeframe

Replaces "interval" with "timeframe", suggesting a temporal boundary that changes.

alternating delay

Highlights the "delay" aspect and its "alternating" nature.

sporadic timing

Focuses on the "timing" of events and their "sporadic" or infrequent nature.

shifting lag

Uses "shifting" to convey the changing nature of the "lag" or delay.

uneven rhythm

Emphasizes the lack of regularity in the "rhythm" or pattern.

FAQs

How is "variable interval" used in psychology?

In psychology, a "variable interval" schedule is a type of operant conditioning where reinforcement is given to a response after an unpredictable amount of time has passed. This differs from a fixed-interval schedule, where the time interval is constant.

What's an example of a "variable interval" schedule in everyday life?

Checking your email is an example. You check at random times, and sometimes there's a new email (reinforcement), but the time between new emails is unpredictable.

What are some alternatives to "variable interval"?

Depending on the context, you could use phrases like "random period", "irregular duration", or "unpredictable spacing".

How does a "variable interval" schedule affect behavior?

Variable interval schedules typically produce steady, moderate rates of responding, as the uncertainty of when reinforcement will be delivered keeps the subject engaged.