Rusbult's Investment Model Read in a Couple's Conversation

Rusbult's investment model: when your written conversations reveal the depth of your commitment

Hello, I am Gildas Garrec, a CBT psychotherapist in Nantes and the founder of Psychologie et Sérénité. Today I would like to explore with you a powerful clinical model for understanding couple dynamics: Caryl Rusbult's investment model. What makes this approach particularly illuminating for ScanMyLove users is that it can be read and decoded through your written conversations. Far removed from the subjective interpretation of a single moment, dozens or hundreds of time-stamped messages trace a relational pattern that cannot be rewritten after the fact. Writing fixes the sequence and makes legible what speech sometimes leaves elusive.

Rusbult's investment model proposes that commitment in a relationship is determined by three key factors: satisfaction, the perceived quality of alternatives, and the level of personal investment. By analysing your digital exchanges, ScanMyLove uses scientific methods to bring to light how these three pillars show up concretely in your daily life.

Satisfaction in Writing: Beyond the Words, the Emotions Revealed

Satisfaction in a relationship is not measured solely by grand declarations of love. In the flow of everyday messages, it nestles in small attentions, positive feedback, and the frequency and quality of exchanges. High satisfaction translates into messages that openly express the pleasure of being together, shared joy, mutual support.

* Examples of messages that reveal satisfaction:
"I loved our evening yesterday, thank you for such a lovely time!"*
"I feel so good when we talk like this."*
"I miss you already, can't wait to see you again."*
"Great day at work thanks to your little note this morning."*

Conversely, growing dissatisfaction can show up as shorter, colder messages, late replies, or a distant tone. Messages may become more transactional, focusing on logistical problems rather than emotional sharing.

* Examples of messages revealing dissatisfaction:
"OK."* (in reply to a long message)
"We'll talk about it later, I don't have time."*
"I'm tired of always having to spell things out for you."*
"Do whatever you want."*

The psychological analysis of the frequency and context of these messages, over time, makes it possible to detect a trend. A spike in positive messages after a shared event? A steady decline in overall enthusiasm? These patterns are valuable indicators of the underlying satisfaction. To go further into the way emotions are expressed, it is worth looking at the 5 love languages revisited through CBT, which can also come through in your writing.

Alternatives: When Other Paths Appear in the Words

The second factor in Rusbult's model concerns the perceived quality of alternatives to the current relationship. It is not necessarily another person, but any option that might seem more rewarding: single life, other personal projects, other potential relationships. Your messages can unintentionally (or intentionally) reveal this perception of alternatives.

* Examples of messages suggesting alternatives:
"A friend of mine met someone great on an app recently, it made me think..."*
"I sometimes wonder whether I wouldn't be more fulfilled on my own right now."*
"My ex got back in touch, it was odd."*
"I've had a job offer in another city, it's tempting."*

Taken in isolation, these messages may be innocuous. But their recurrence, their context, or the way they are introduced into conversations can form a pattern. Does one partner frequently mention opportunities that would take them away from the relationship? Are discussions about other people or other ways of living becoming more frequent and more enthusiastic? These weak signals, accumulated in writing, allow for a fine-grained psychological analysis. If you are wondering about the pull of dating apps, our article on swipe addiction may shed light on certain behaviours.

Investment: The Weight of Shared History and Shared Plans

Investment refers to everything the partners have put into the relationship and that would be lost in the event of a break-up: time, emotional effort, material possessions, mutual friends, life plans. The higher the investment, the stronger the commitment. In written conversations, this investment shows up in references to the shared past and in projections into the future.

* Examples of messages showing high investment:
"I remember our first trip to Rome, it was magical."*
"I can't wait for us to move in together and build our nest."*
"We've been through so much together, I can't picture myself without you."*
"I've started planning our summer holiday."*

Conversely, a decline in references to the shared past, or a reluctance to discuss the future, may indicate a gradual disinvestment. Messages may avoid subjects that imply a long-term commitment, or play down the importance of past efforts.

* Examples of messages suggesting low investment or disinvestment:
"Don't get carried away about the future, we'll see."*
"I'm not sure I want to do this project with you."*
"I don't really want to remember that."*
"I feel like I'm the only one making an effort for our shared plan."*

Rereading hundreds of messages on your own is exhausting and can lead to interpretation bias. The analysis by ScanMyLove brings out these patterns, these