The Science Behind My Calendy

Our approach is built on decades of cognitive science research about how your brain naturally functions throughout the day.

Cognitive Science
Chronobiology
Productivity Research

Cognitive Performance Fluctuations

Your brain doesn't maintain a constant level of performance throughout the day. Different cognitive abilities peak at different times based on your body's natural circadian rhythms and energy fluctuations.

Key Research Findings

  • Task-Time Alignment

    Studies show that matching task types to your optimal cognitive windows can increase productivity by 30-40% compared to random scheduling.

  • Chronotypes

    People have natural variations in circadian rhythms (chronotypes) that affect when they perform best. Morning-types (larks), evening-types (owls), and in-between types experience peak performance at different times.

  • Cognitive Specialization

    Different brain networks optimize for different types of thinking (analytical, creative, strategic) at various times throughout the day based on hormone levels, neural activity patterns, and energy availability.

Cognitive Performance Throughout the Day

MorningAfternoonEvening
9:00 AM

Analytical

100%
Effectiveness

Creative

45%
Effectiveness

Strategic

85%
Effectiveness

Technical

85%
Effectiveness
Note: This visualization shows average patterns. Your personal cognitive rhythm may vary based on chronotype and other factors.

Understanding Your Chronotype

Morning Types (Larks)

  • Wake up naturally early (5-7 AM)
  • Peak analytical performance in morning hours
  • Energy and alertness decline in late afternoon
  • Best for analytical, detail-oriented work in mornings

Evening Types (Owls)

  • Naturally wake later, stay alert until late evening
  • Cognitive performance increases throughout the day
  • Peak creative performance in evening hours
  • Best for creative, big-picture thinking in evenings

Beyond Chronotypes: Other Factors

While chronotype is a major factor in cognitive performance, several other variables also influence your daily cognitive rhythm:

Sleep Quality

Research shows that even minor sleep deprivation can reduce cognitive performance by 20-30%. Quality sleep enhances all cognitive abilities, especially executive functions.

Nutrition

Blood glucose levels significantly impact cognitive function. Stable energy from proper nutrition improves sustained attention and decision-making quality.

Ultradian Rhythms

Your brain naturally cycles through approximately 90-120 minute periods of high alertness followed by fatigue, affecting your moment-to-moment cognitive capacity.

Task Type

Different cognitive tasks engage different neural networks. Creative tasks activate different brain regions than analytical ones, each with optimal performance times.

Cognitive Task Classification

My Calendy uses a scientifically-informed system to classify different types of tasks based on the primary cognitive abilities they require. This allows us to match tasks to your optimal cognitive windows.

Analytical Tasks

Tasks requiring logical reasoning, critical thinking, and detail-oriented problem-solving.

Examples:

  • • Data analysis and financial modeling
  • • Debugging code or technical troubleshooting
  • • Research requiring critical evaluation
  • • Complex calculations and decision-making
Optimal timing: Usually best performed during your peak alertness period (morning for most people)

Creative Tasks

Tasks requiring innovative thinking, imagination, and generating new ideas or connections.

Examples:

  • • Brainstorming sessions and ideation
  • • Content creation and writing
  • • Visual design and artistic work
  • • Creative problem-solving sessions
Optimal timing: Often best during periods of mild fatigue when the brain's inhibitory controls are relaxed (afternoon or evening for many)

Strategic Tasks

Tasks requiring big-picture thinking, planning, and synthesizing information across domains.

Examples:

  • • Long-term planning and goal setting
  • • Strategic decision-making and prioritization
  • • Project planning and resource allocation
  • • Competitive analysis and market assessment
Optimal timing: Often best during mid-day when you have enough information from the morning but aren't yet fatigued

Technical Tasks

Tasks requiring procedural knowledge, skill execution, and focused implementation.

Examples:

  • • Coding and technical implementation
  • • Creating technical documentation
  • • Technical design and architecture
  • • Technical reviews and audits
Optimal timing: Often best during mid-to-late morning when alertness is high but creative inhibitions are lower

My Calendy Analyzes Your Tasks Automatically

When you input a project or task, My Calendy uses natural language processing to determine which cognitive category it best fits into, then schedules it during your optimal window for that type of work.

See How It Works

Scientific Research

My Calendy's approach is based on peer-reviewed scientific research in chronobiology, cognitive psychology, and productivity studies. Here are some of the key publications that inform our methodology:

Time of day effects on problem solving: When the non-optimal is optimal

Wieth, M. B., & Zacks, R. T.
Thinking & Reasoning, 17(4), 387-401, 2011 • DOI: 10.1080/13546783.2011.625663

Synchrony and Asynchrony: The Individual and Social Chronobiology of Work

Foster, R. G., Kreitzman, L., & Wulff, K.
Oxford Handbook of Work and Sleep, 2019 • DOI: 10.1093/oxfordhb/9780190674991.013.5

Time of day effects on cognitive performance

Schmidt, C., Collette, F., Cajochen, C., & Peigneux, P.
Psychological Bulletin, 133(3), 626-648, 2007 • DOI: 10.1037/0033-2909.133.3.626

The human circadian timing system and sleep-wake regulation

Czeisler, C. A., & Buxton, O. M.
Principles and Practice of Sleep Medicine (6th ed.), 2017

Matching tasks to brain states: A theoretical framework for human performance in space

Basner, M., Savitt, A., Moore, T. M., & Gur, R. C.
Acta Astronautica, 181, 527-533, 2021 • DOI: 10.1016/j.actaastro.2021.01.049
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