CTE Knowledge Index
Comprehensive reference for Decision Load Index methodology, cognitive throughput research, and evidence-based productivity science. Definitions, formulas, and citations.
Core Concepts
Decision Load Index (DLI)
A composite metric measuring the cognitive burden of unmade decisions. DLI quantifies
the "invisible weight" of open loops, unprocessed inputs, and ambiguous commitments
that traditional productivity metrics miss. Scored 0-100, where lower is better.
DLI = f(open_loops, unprocessed_inputs, ambiguous_actions, overdue_items, active_projects)
Cognitive Thought Engine. (2026). Decision Load Index: A conceptual framework for measuring cognitive burden in knowledge work. Zenodo. https://doi.org/10.5281/zenodo.18217577
0-20
Excellent
Excellent
21-40
Good
Good
41-60
Moderate
Moderate
61-80
High
High
81-100
Critical
Critical
Cognitive Throughput
The rate at which decisions and tasks can be processed effectively without degradation
in quality. Unlike raw productivity metrics, cognitive throughput accounts for the
quality of output and sustainability of pace. High decision load reduces cognitive
throughput even when task completion rates appear stable.
Concept derived from information processing theory and industrial engineering throughput models.
Open Loop
A commitment, idea, or task that has been mentally acknowledged but lacks a clear
resolution or next action. Open loops consume cognitive bandwidth continuously,
even when not consciously considered. The Zeigarnik Effect explains why unfinished
tasks persist in memory.
Term popularized by David Allen in "Getting Things Done" (2001). Psychological
basis from Bluma Zeigarnik's 1927 research on incomplete tasks.
Decision Fatigue
The deteriorating quality of decisions made after extended periods of decision-making.
Research demonstrates that decision quality degrades measurably throughout the day,
leading to either impulsive choices or decision avoidance. The mechanism appears
related to glucose depletion.
Key research: Danziger, Levav, & Avnaim-Pesso (2011) - Israeli parole board study
showing decisions dropped from 65% favorable to 10% before breaks.
Psychological Mechanisms
Zeigarnik Effect
The psychological phenomenon where unfinished tasks are remembered better than
completed ones. Discovered by Bluma Zeigarnik in 1927 when observing that waiters
remembered incomplete orders more accurately than completed ones. Explains why
open loops consume cognitive resources even when not actively considered.
Zeigarnik, B. (1927). "On finished and unfinished tasks." Psychologische Forschung.
Attention Residue
The phenomenon where part of cognitive attention remains on a previous task after
switching, reducing effectiveness on the current task. Even when moving to a new
activity, residual processing of the prior task continues in working memory.
Leroy, S. (2009). "Why is it so hard to do my work?" Organizational Behavior and
Human Decision Processes.
Context Switching Cost
The cognitive penalty incurred when moving attention between different tasks,
particularly unrelated ones. Includes time to restore mental context, reduced
depth of engagement, and increased error rates. Research indicates an average
of 23 minutes to return to deep focus after interruption.
Microsoft Research Human Factors Lab; Gloria Mark, UC Irvine (2008).
Cognitive Load Theory
Framework developed by John Sweller describing the amount of mental effort required
to process information. Distinguishes between intrinsic load (complexity of material),
extraneous load (how information is presented), and germane load (effort to form
lasting memories). DLI primarily addresses extraneous cognitive load.
Sweller, J. (1988). "Cognitive load during problem solving." Cognitive Science.
Research Findings
| Finding | Source | Implication |
|---|---|---|
| 23-minute recovery time after interruption | Microsoft Research | Protect focus blocks; batch interruptions |
| 20-40% productivity loss from multitasking | Multiple studies | Single-tasking outperforms switching |
| Decision quality drops 35-65% by afternoon | Stanford Behavioral Lab | Schedule important decisions in morning |
| 4-7 items working memory capacity | Miller (1956), Cowan (2001) | Externalize to preserve capacity |
| Collaboration time +50% since 2020 | Microsoft Work Trend Index | More decisions per day than ever |
| Knowledge worker interrupted every 11 min | Gloria Mark, UC Irvine | Structural intervention required |
DLI Input Components
Open Loops
Tasks or commitments without clearly defined next actions. Example: "Think about
Q2 planning" - the action is ambiguous. High counts indicate accumulated
unprocessed commitments.
Typical range: 5-50 items
Unprocessed Inputs
Items in inboxes (email, messages, notes) that require decisions about what to do.
Not just reading, but determining action. Normalized against personal baseline
to account for volume differences.
Formula: (current_inputs - baseline_inputs) / baseline_inputs
Ambiguous Actions
Tasks where the "how" isn't clear. The task exists, but executing it requires
additional decision-making about approach, resources, or sequence.
Overdue Items
Commitments past their explicit or implicit deadlines. Create background anxiety
and signal accumulating decision debt.
Active Projects
Concurrent workstreams requiring ongoing attention. More projects means more
context switching and higher baseline cognitive load.
Research suggests 3-5 active projects is sustainable